Using empowerGMAT to study to retake the GMAT and so far it has been awesome. Great video explanations, TEST IT strategies, etc.

Rich's explanation of TEST IT and Test the Answers and other empower tactics have been very helpful as I prepare for round 2 of taking the GMAT.

I used empowerGMAT before but I sucked at pacing myself, so this time around I'm using the score booster lesson to beat my official score and focus on pacing.

I've recommended empowerGMAT to others because it is at your ow pace, the modules are self-explanatory and there are videos for every question in the book. Really great resource if you want to become a GMAT assassin.