Effective, easy to use, comprehensive

I needed to improve my quant score, which is why I chose TTP. They have a program specific to quant. After taking the diagnostic test, you get a study plan.

The way I attacked the curriculum is I focused on going through all the textbook chapters (which cover every single kind of problem you could possibly see on GMAT quant). Then I would emphasize the "easy" and "medium" practice tests, because TTP says what separates the good from great is not the ability to get easy questions right but the inability to get the easy questions wrong.

This seemed to ring true because I finished the whole textbook and 2/3 of the practice problems (I did 1640, totaling over 33hrs of working problems) and proceeded to score in the middle of my target range.

The lessons are so clear. The curriculum is easy to follow. The solutions make sense. And Scott and Jeffrey respond to emails.

I wouldn't try any other study plan.