Hi JSFTX,
GMAC has publicly stated that the Official Score that you earn on Test Day is within +/- 30 points of actual ability. Assuming a similar 'swing' in how your CATs function, your 3 CAT score results show that you essentially performed the same each time (about 660 +/- a few points). You handle certain aspects of the GMAT consistently well, but you also make certain consistent mistakes. I think that it would be a good idea to take one of the Official GMAC CATs to see how you Score. Make sure to take it in a realistic fashion (take the FULL CAT - with the Essay and IR sections, take it away from your home, at the same time of day as when you'll take the Official GMAT, etc.). Once you have that score, you should report back here and we can discuss the results and how best to proceed.
In addition, before I can offer you any additional advice for your studies, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied?
2) What study materials have you used so far?
3) Are these the only 3 CATs that you've taken? If there were others, then how have you scored on those other CATs (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your ultimate goal score?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School?
GMAT assassins aren't born, they're made,
Rich