Testimonials
Here are the experiences of students I’ve had the pleasure of working with through their GMAT preparation. Each story represents not just a score achievement, but personal growth and confidence gained along the way. Their successes matter to me because I’ve seen the work they put in and the obstacles they overcame. As you read their words, know that the same supportive guidance awaits you—because your progress is what makes this work meaningful.
Applying to an MBA while working full-time was one of the most intense and emotionally demanding experiences of my life. Navigating this high pressure journey was only possible for me when I chose the right team and decided to invest in the best.
Choosing Christian’s platform was by far one of the smartest decisions I made, trust me, your future self will thank you! His way of teaching the Quant section is not only efficient and strategic, but also warm and human. He gave me clarity when I felt lost, structure when I felt overwhelmed, and the confidence I needed to push forward. Thanks to him, I hit my target score and made it into my dream MBA. I’ll always be grateful and couldn’t recomend him enough.
LUCÍA HAITO // MIT SLOAN SCHOOL OF BUSINESS
I wish I would’ve chosen to start my GMAT practice with Christian before. I used several online resources and group studying and these tools didn’t allow me to achieve the score I required. However, I reached out to Christian to have private classes in an intense 1- month push in order to give my score a boost, after that month the results were amazing!
Christian was not only a teacher for me, but a mentor too. He has the best hacks and tips to approach the GMAT but also invested time in helping me to strengthen my self-confidence through advice and lots of patience.
I highly recommend his online course to set the bases and the private classes to really take the results to a next level.
MAGDALA DIAZ DE RÁVAGO // THE TUCK SCHOOL OF BUSINESS
The combination of on-demand course and tutoring helped me navigate the quant section seamlessly!
I was fortunate to have been recommended to work with Chrisian from the start. I cannot speak for other platforms, however, I can say that his program has a great structure to cover ALL the quant themes. After completing the course multiple times, I developed a great foundation to tackle problems and most importantly, to better time manage this section.
Finally, I complemented my preparation with a tailored tutoring program. This was just what I needed to round out my weak areas. These sessions were extremely efficient, since you do all the problems and review them on your own time. That way my sessions with Christian were golden and completely focused on my areas of opportunity.
I would recommend working with Christian to ANYONE who is planning on taking the GMAT.
EDUARDO CORREA // HARVARD BUSINESS SCHOOL
To me, Christian was way more than just a Quant teacher, he was a friend and a mentor. I would recommend anyone that is looking to start this journey to not only invest on his online platform, but also his 1-on-1 classes, which helped me dig deeper into my preparation. Christian is 100% a master of GMAT preparation and was a pivotal part of my GMAT process.
ANDRE SANITZ // CHICAGO BOOTH SCHOOL OF BUSINESS
Christian was instrumental in helping me boost my GMAT quant score in just a few weeks, ultimately helping me achieve my goal of attending one of my dream schools. He’s excellent at breaking down math concepts and teaching smart strategies that make you much more efficient. I only wish I had reached out to him sooner instead of spending so much time trying to prep on my own with other online resources.
IOKIN AZCARRAGA // CHICAGO BOOTH SCHOOL OF BUSINESS
Working with Christian was a turning point in my GMAT preparation. The online course is structured in a way that builds real understanding of core quant concepts, not just shortcuts. After working through the material and practicing consistently, I felt much more confident managing time and approaching difficult problems.
The 1-on-1 sessions took things to another level. They were focused entirely on my weak spots and helped me refine my strategy with precision. In just over a month, I was able to boost my quant score consistently to the 49–50 range.
Highly recommended for anyone aiming to maximize their quant performance!
RODRIGO LAVIN // CHICAGO BOOTH SCHOOL OF BUSINESS
Christian totally changed the game for me when it comes to tackling quant questions. I used to believe my approach was solid, but he opened my eyes to the fact that there’s always room to do even better. Thanks to his pointers, I achieved a Q49 and got an overall score of 730! I can’t recommend his services and his approach enough – they’re the real deal!
ROBERTO RODRIGUEZ // THE WHARTON SCHOOL
Christian helped me raise my quant score to be able to obtain a 700 in just one month. The online platform truly helped to internalize his way of solving problems fast and accurately. While taking the mock tests, I always asked myself: “what would Christian do?”
I know that if I had met Christian before I would have obtained 700 in one third the time, at least. His methods and strategies are not the typical ones taught in books, as the classes are truly personalized, which guarantees fast improvement. Totally recommended!
ALFREDO MORENO // KELLOGG SCHOOL OF MANAGEMENT
Christian is an excellent teacher, not only because he is an expert in GMAT Quant, but also because he really cares for his students and is always available and willing to help. His online platform was very useful to learn the theory and main techniques in a clear and structured way, and at my own pace.
Then, during one-on-one classes Christian helped me to gain speed and confidence, by teaching me good tricks, short-cuts and simple approaches to solve questions faster. Most importantly, Christian was very understanding during the whole GMAT process; he shared lots of material to practice and gave me excellent advice and guidance along the way. I highly recommend him!
ADRIANA ARNILLAS LLOSA // STANFORD GRADUATE SCHOOL OF BUSINESS
Christian really helped me understand Probabilities and Ratios, my two weakest topics in math. He gave me good tricks to tackle these problems and lose the fear. Plus, he was very understanding during the whole Gmat experience and always supported me with additional material to study and helped me when I had any particular doubts with math problems.
STEPHANIE CANNOCK // HARVARD BUSINESS SCHOOL
Before taking Christian’s course, I have been studying by myself for more than a year and I could only achieve a Q45 (on a good day). After taking the course, in only 1 month I managed to get Q48 in my official exam and reached my goal of 720. I recommend Christian’s course 100% and I wish I had contacted him sooner.
LAURA ZEVALLOS // HARVARD BUSINESS SCHOOL
Christian is a great teacher with complete mastery of all the topics in GMAT Quant. He is efficient and precise when solving problems, and some of his abilities stick with you when taking his course. I struggled with remembering rules and simplifying equations but through the course my ability greatly improved. After my first attempt studying on my own, Christian helped me with personalized lessons and managed to help me raise my Quant score from a 44 to 48 and reaching my target score, the whole experience was truly worth it.
ALFONSO CALDERON // CHICAGO BOOTH SCHOOL OF BUSINESS
When I started working with Christian, I had a really short timeframe to improve my score, I was already doing good in mock tests and had all the knowledge, but I couldn’t reflect it on test day. Christian’s pragmatic approach to solving quant problems saved me a lot of time on test day and made the questions that seemed hard look straightforward. I highly recommend this course, and it will definitely improve your knowledge and give you the necessary tools to leverage on test day. People experiencing the same situation as me should consider this course without a doubt.
ISAAC CABABIE KIBRIT // NYU STERN SCHOOL OF BUSINESS
Taking intensive classes with Christian, I was able to increase my quant score from 30 to 49 in two months! His methods and strategies really worked and helped me to master complicated subjects fast. I would recommend him to anyone who wants to score very high on GMAT quant
GABRIEL CHIRINOS // THE LONDON SCHOOL OF ECONOMICS AND POLITICAL SCIENCE
Christian was a great tutor. From the first day, I saw his dedication and his teaching methodology and advices allowed me to learn the concepts efficiently. The exercises that we solved later together, with time as a constraint, also contributed to enhance my critical thinking and ability. Christian contributed enormously to me being accepted by ESMT Berlín. Always Thank you Christian!!
DIEGO CAMONES // ESMT BERLIN
When I began this journey I felt very unsure of myself. I had never been good at math, I hadn’t done any complex math in over 7 years, and my first GMAT simulation had resulted in a crushing Quant score of 32…
However, Christian knew exactly what to do. He layed out a rigorous -but reasonable- plan of attack, and in only 2 months I was scoring 46’s and 47’s in my simulations.
His online platform is an extremely powerful tool, with brilliant tutorials that allow you to study -and learn- on your own time; his deep knowledge of the theory and all the little tricks make math easier and even enjoyable!
But, more importantly, Christian is someone who truly cares about his students and wants them to succeed. He motivated me and believed in me, even when I felt like giving up.
When I began this journey I thought I was hiring a tutor. Instead, I ended up finding a mentor and a friend. Thank you Christian!!
PEDRO BARDALES // KELLOGG SCHOOL OF MANAGEMENT
At the beginning, I had my doubts about taking recorded online lessons, but my experience with Christian’s platform totally changed my mind. The platform is great, Christian has the ability to impart knowledge and the famous tricks to others through recorded lessons. Also, you can go at your own pace and when you need to delve into a topic, taking classes with him take your knowledge to another level.
I found in Christian not only the best math teacher for the gmat, but also someone who helped me and gave me guidance in this whole process and a friend.
If you are reading this, do not hesitate and reach him.
ELIAS CASTRO // THE TUCK SCHOOL OF BUSINESS
When I started working with Christian I was already doing well in mocks, but it wasn’t reflecting on my official tests. With the classes I quickly realized that there were things that I didn’t know I was missing in my preparation. I put in the hard work, but this time it was the RIGHT hard work.
I used the online platform to binge learn most of the tricks and new strategies in a couple of weeks while balancing one on one classes and a demanding job schedule.
Finally in just one month I was able to land a solid 49 in quant, and I truly believe that Christian’s help and expertise was an important factor in achieving this result. I highly recommend him!
FIORELLA JUSCAMAITA // HAAS SCHOOL OF BUSINESS
What makes Christian different (and great) is that he makes an effort to understand where you are struggling, which topics are your strength, and how you can improve. Through his teaching method, I raised my quant score from Q44 to Q49. If you are aiming for a top MBA program, I suggest you reach out to Christian.
ALEJANDRO COUTTOLENC // COLUMBIA BUSINESS SCHOOL
Like for many people, the GMAT was a real challenge for me. In order to succeed in quant you don’t only need to be dedicated and hard working, but you also need to dominate the techniques, tricks, and strategies to tackle every topic in the exam. All of that is taught by Christian in a very easy, simple, and efficient way. I recommend him 100%, he’s a math expert and great teacher.
JOSE PARDO // DARDEN SCHOOL OF BUSINESS
Christian was incredibly helpful in strengthening my quant skills for the GMAT. Not only is he a brilliant teacher that works restlessly to break down concepts making them easily digestible for his students, he also gives valuable strategic recommendations that allow you to better approach the overall test. I highly recommend MBA Prep Tutoring to anyone interested in applying to a top 10 MBA program.
GONZALO DE CARDENAS // KELLOGG SCHOOL OF MANAGEMENT
Before I started working with Christian I believed that I was prepared and only needed to correct some specific aspects. But I couldn’t be more wrong. The method on how to approach each specific problem and how to apply the theory were the steps that I was missing.
IGNACIO MOLINA // IESE BUSINESS SCHOOL
Working with Christian was a real pleasure. Since day 1 it was easy to tell he had all the knowledge and necessary tools to help you get the desired score. He had a thoughful approach for the whole proces and offered guidance in many aspects along the way (besides just math). 100% recommended!
SALVADOR CARRILLO // COLUMBIA BUSINESS SCHOOL
My first contact with GMAT Quant preparation was through Christian’s online classes and 1o1 lessons.
Through the online classes, I felt very comfortable with this teaching method: structured topics and lots of exercises with clear explanations and helpful tips (which I think make the difference between solving a Quant problem correctly vs doing it in an optimum range of time). As I progress through the course I was able to notice how I was improving, and how know-how from previous lessons was helping me with further topics. Through his 1o1 lessons, I was able to polish how I solve and approach the different types of exercises. He focused on exactly which was my procedure and how I could optimize it to reduce the time I took to solve each exercise.
I definitely recommend Christian. The structure of his course, the clarity of his explanations (both through videos and 1 on 1 classes), and his accessibility to ask questions and support are key differentiators to his Quant program, and helped me reach a score of 49 in Quant section.
VANESSA ABUNDIS // CHICAGO BOOTH SCHOOL OF BUSINESS
I was referred to Christian by a friend, and booked a meeting with him on the same day after being impressed by his website. I was pleasantly surprised by his availability and encouragement after I shared my initial results. During our one-on-one sessions he was able to identify my weaknesses. I believe this was a changing point in my GMAT prep since I gained consciousness of small mistakes and time-consuming tasks that were very specific to me and that I needed to avoid. When I saw my quant results I contacted him immediately to thank him. I recommend contacting Chirstian for guidance. It was truly one of the best decisions I made in my GMAT prep.
MELISA YNGA DURAND // THE FUQUA SCHOOL OF BUSINESS
Christian was a great support during my preparation for the GMAT exam, not only for his methodology but also for the motivation and confidence that he gave me throughout the process. His methodology and his platform are 100% recommended, the videos are very easy to understand and you can quickly solve high-level problems in a more orderly and simple way. Also, he manages to provide you with the precise techniques and strategies that are needed to be able to optimize your time during the exam. I strongly recommend him as a Quant teacher.
ANDREA PIMENTEL // FRANKFURT SCHOOL OF FINANCE AND MANAGEMENT
I had tried many math courses to prep for the GRE Quant section before finding Christian. Taking classes with him was the best decision I ever made!
With his teaching method, I was able to detect tricks and techniques to answer the test. He has all the necessary tools to make studying easy and not overwhelming. While he teaches, he patiently explains each subject with exercises and examples.
Something that I always appreciated was his encouragement to practice every day. He is an excellent math teacher and kindly understands when math is not your strongest subject. Thanks to his excellent teaching method, I was able to feel confident to reach a higher score on the Quant section
PAULINA BUSTOS // MPA-DP COLUMBIA UNIVERSITY : SIPA
Christian has various formulas that will help you approach the GMAT in a better way. For me, the GMAT, especially the quant section has been my Achilles heel. I have been studying with Christian’s virtual classes and zoom meetings and they have helped a lot. I was be able to get the score that I needed. Thank you, Christian
HEIDY SOSA // DEGROOTE SCHOOL OF BUSINESS
The classes with Christian have been very helpful to understand all the topics and increase my level in math. Christian is an expert in math and he can even explain the hardest topics with a method that is simple to understand.
FLAVIA BUENO // BABSON GRADUATE SCHOOL