I normally don't write very many reviews, but felt the need to write this one. I want to start out my saying that I struggled a LOT with the GMAT. I first started out by taking the MGMAT course in Fall 2018, and took my first test in January of 2019. I received a score of 650, with a Quant score of 43. Naturally, I was disappointed and wanted to retake the exam. Just as background, I've never struggled too much with math, so I was a little surprised at my score (goes to show you how different the GMAT is from a standard test!).
I was referred to Hee Jean at Math Revolution by a close friend of mine from banking. I signed up for the private tutoring sessions as I wanted to really pinpoint my weaknesses and understand where I could improve. Hee Jean is truly the MOST patient person you will ever meet, and also the brightest. He always knew a shortcut to every problem (this is the trick of the GMAT!), and his explanations were always extremely clear. He also sends you organized notes from your sessions. On top of that, he is truly always available for a question and for scheduling sessions, and as someone who was in a pretty time-intensive job, it was a relief to be working with someone who always had time for you.
I took the GMAT again in July 2019 and scored a 49 in Quant on the test! I was happy with this score, but still felt like I could do better. I took a break from the GMAT (I was pretty worn out) for about a year, and in June 2020 I reached out to Hee Jean to ask him for some additional help. This is where I was really impressed with Math Revolution. Even after almost a YEAR, Hee Jean responded to my email in less than a day and reinstated my access to the Math Revolution website (which, by the way, has AMAZING resources that I went through with a fine-toothed comb) for free. He offered his help if I had any questions while I went through the materials again to freshen up my memory. I ended up taking the GMAT for the last time in July 2020, and scored a 50 on Quant.
I can't say enough good things about Math Revolution - going from a 43 to a 50 definitely takes work, but Hee Jean WILL get you there. I'm so glad I took my friend up on this recommendation (he also had an amazing experience with Hee Jean) and I cannot recommend this class more. Do the private tutoring sessions - it is worth the money (and it's cheaper than all of the other services!) and Hee Jean is very cognizant of your time and is VERY efficient with the time you have allotted for the session.