Just wanted to share my experience with MBA Gambit. Prior to using them for private tutoring, I had enrolled in a GMAT prep course with one of the big names. The course was helpful with teaching the various concepts for the test, however they didn't really help me with drill down on the areas that I felt uncomfortable with or with test taking strategies. After the course, I took the exam and improved upon my score by 30 points from my practice exams. However, my final score was still disappointing as I was in the mid 600's.
It was then that I decided to look for a private GMAT tutor and after a recommendation from a friend, I went with MBA Gambit. After an initial assessment, my tutor Artem was able to key in on my areas of weakness and help me build up the necessary knowledge. I took eight 1 hour tutoring sessions and by the end, I noticed that my practice exams were significantly higher than when I started. Thankfully, it wasn't only my practice exams that went up higher. I took the GMAT exam again and scored a 700!