While extra questions are always helpful, I wouldn't worry too much about purchasing new guides just for the sake of those question banks. The important part as you begin to study is to get the content down, and the chapters along with the in-action problems in our guides should help you with that. Once you've found that you understand the material behind the types of questions asked on the exam, use our guides to reference specific questions in the OG that touch on the content you just learned. Since the three OGs are the only places you'll be able to find questions that have previously been on real GMATs (aside from the two online GMAT Prep tests) you should use those questions first and foremost. Only if you run out (and if you're studying properly you shouldn't!) should you need our question banks.
Based on how you're scoring, and what your goal score is, once you've gone through our 8 main guides, I would suggest looking into our Advanced Quant guide, which does come with extra questions. But only do this if you feel you want a little bit of an extra push once you've finished going through the first 8. The quant guide is here: http://www.manhattangmat.com/storeitems ... 0&catid=10
On a side note, since you've purchased the Official Guide Companion, you now also have access to our online tool called the OG Archer ( http://www.manhattangmat.com/ogc-plus.cfm
). I would strongly suggest using it, as it is a great way to keep track of your progress, time yourself, and analyze your results as you go through OG problems!
Caitlin Clay | Manhattan GMAT Student Services Associate | New York
Manhattan GMAT Discount | Manhattan GMAT Reviews