Sherpa Prep is worth it!!!
Nafeez and the rest of the team are committed to making one's time at Sherpa valuable. I was in awe at how organized they were with the whole process from beginning to end. What makes matters even better, is that Nafeez lets you take the whole GMAT/GRE course for free. I cannot recommend Sherpa enough. They are all first-class humans committed to their students in the present and in the future.