In my 9-session courses, all students are invited to try the first session for free. At the end of that trial session, one or more students invariably ask me, do I need to take this course to get a good score on the GMAT?
In a word, no. In fact, I scored a 760 on my first attempt, and I didn’t take a prep course. But then again, I devoted my lunch hour to studying for more than two months straight. Every. Single. Workday.
I’d like to think I’m a smart guy, but even so, there’s no way I could have scored a 760 without putting in significant study time. That is true for 99.99% of the GMAT-taking population, prep course or no. If you want to get the most out of my class, be prepared for an hour of homework every day for the duration of the course.