I would like to put my two cents in this very informative thread.....
I used this website to find out the best study sources and shortlisted to
MGMAT and GMAXonline. i bought
MGMAT sentence correction guide to start but was too lazy to start reading. Then i decided to purchase GMAXonline and it really made GMAT interesting coz i could watch the online lectures while sitting in a bathtub or even while cooking. The key to a good score in GMAT is to study everyday, but after a hard day of work sometimes its really hard to get back to books. the lecture definitely made studying more lively and gave me the extra push that i needed to cross the 700 mark. I ended up with a 730 score and a lot of credit for that goes to GMAXonline.
Since i was on a tight budget when i started my prep, i didn't feel like spending $400 for the course, so i ended up dividing the number of views between me and my friend. Since GMAX gives u 90 views for 30 lectures, we both managed to watch every lecture and a repeat of the topics we found a little tough.
Overall, a 5 star rating from me to GMAXonline....