This question seems a bit outdated, however, I will still attempt to answer the question. Doing so might not help you in particular because I am assuming that you have already taken the GRE exam by now. However, other students who have yet to take the GRE might stumble upon this response and perhaps find it helpful.
I agree with what Carcass said, the best GRE preparation is not necessarily the more intense material. What's more important, and crucial to GRE success, is mastering the basic fundamental concepts of various topics tested by ETS. Being introduced to hard and unrealistic practice questions will not help you get the score you desire unless you understand the underlying logic behind the practice questions.
It is, therefore, a common misconception that the more intense the GRE preparation the better the scoring outcome. By the way, this is not an attempt to degrade
Magoosh, but I will advise you to master rudimentary concepts before using
Magoosh.