Hi nikiwalt,
First off, a 660/Q50 is a strong Score, so it could be enough to get you into your first-choice School. As such, a retest might not be necessary. Depending on the Schools that you plan to apply to, you would likely find it beneficial to speak with an Admissions Expert about your overall profile. There's a Forum full of those Experts here:
https://gmatclub.com/forum/ask-admissio ... tants-124/There's certainly no harm in continuing to study though - and you certainly have the opportunity to pick up some significant points in the Verbal section. Many Test Takers spend 3 months (or more) of consistent study time before they hit their 'peak' scores though, so with just 2 months of study, it's likely that you just have not put in enough time and effort yet.
GMAC has publicly stated that the Official Score that you earn on Test Day is within +/- 30 points of actual ability. Assuming that you took your CATs in a realistic fashion, most of your CAT score results - along with your Official Score - show that you essentially performed the same each time (about 680 +/- a few points). You handle certain aspects of the GMAT consistently well, but you also make certain consistent mistakes.
Before I can offer you the specific advice that you’re looking for, it would help if you could provide a bit more information on how you've been studying and your goals:
1) How many hours did you typically study each week?
2) When are you planning to apply to Business School?
3) What Schools are you planning to apply to?
While the ESR doesn’t provide a lot of information, there are usually a few data points that we can use to define what went wrong on Test Day (and what you should work on to score higher). Since you purchased the ESR, I'll be happy to analyze it for you. Before you can include attachments to your posts/PMs, you need to have at least 5 posts in the forums. If you would rather not go through those extra steps right now, you can feel free to email your ESR directly to me (at
Rich.C@empowergmat.com).
GMAT assassins aren't born, they're made,
Rich