Hi ajstewar28,
While working on practice sets of questions (both online and in the
OG) are important parts of the overall GMAT training process, the only real way to assess how well you might perform on the Official GMAT is to take FULL-LENGTH practice CATs under realistic conditions (meaning that you 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.). By extension, those results can help you to define how effective your current study plan is - and how you might adjust aspects of it.
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) Have you used any other study materials besides the ones that you mentioned?
3) How have you scored on EACH of your CATs/mocks (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your goal score?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School?
7) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich