Um, what school are you applying to that you can start just a few weeks after taking the GMAT? Usually you apply the fall before you start, not that summer. Or did you get a conditional acceptance and just need to retake?

I think your plan is fine. Your GMATPrep scores will definitely be more accurate, but I don't think there's any harm in the approach you've taken so far. As long as you're carefully reviewing your tests and working on weak areas, you're good.

There are soooo many practice questions in the three different official guides (11th edition, plus separate verbal and quant books) that you'd be better off doing that than retaking GMATprep again and again just to get a handful of new questions.

Wingmat is only ever mentioned by people who work for the company. i.e., posters like you who are brand new and making their first or second post. They keep going into different GMAT forums and asking this same question, again and again. And every time, at least one real forum member points out that...

If you've only relied on Kaplan and the OG, you're going to be in for a surprise on test day. Kaplan's tests do not mimic the real test at all. You MUST take the official GMATPrep tests! And if you want more practice after that, take the Princeton Review tests. They are adaptive like the real thing ...

Are all of those 500-score tests Kaplan tests? They tend to seriously underestimate your score, so if you've only done Kaplan tests, take a GMATPrep official test (mba.com) or Princeton Review's online test (www.review.com) to get a much better idea of how you're really doing. If you can't crack 600...

I agree with Ron. You have to do CATs on the computer. Paper tests are not even remotely indicative of what to expect for timing, scoring, etc.