Hi alfredo,
Mind if I chime in?
I, naturally, vote Kaplan (I wouldn't work here if I didn't believe it!). And here's why:
-9 CATs, fully adaptive.
-Smart Reports, breaking down your performance on those CATs by content area and dynamically suggesting additional workshops and practice
-Kaplan teachers, trained through a program so selective only 1 out of 6 are accepted
-The Higher Score Guarantee, which has three components: Readiness, Satisfaction, and Money-Back. The first part is especially valuable; unlike guarantees from most other test-prep companies, Kaplan's HSG benefits you even if you decide to delay taking the actual GMAT. There is no need to mar your record with a poor score just to have a chance to try again!
-Kaplan centers across the US, allowing you to make up missed sessions anywhere and anytime
-Lessons On Demand, videos of expert Kaplan teachers covering all of our course material--available both as make-up lessons and as review.
Finally, I'm also a little puzzled, since I've never heard rumors about refusing to answer OG questions (Josh, does Knewton have a question-source policy for online posts like MGMAT does? Could alfredo be referring to that?) but I CAN tell you that the Kaplan course includes a copy of the OG12, and the official guide questions are built into the lesson so you know throughout that Kaplan strategies work on real GMAT problems.
