Hi cld238,
Thanks for the nice feedback. I'm glad you like the Guide.
I think the Manhattan test provides a good idea of your present skills. So, save that GMATPrep test for another day.
590 is a GREAT starting point. That's a 58th percentile score, so most people never even get a score that good (after months of studying).
It's hard to say what a "realistic" goal is. I've seen people achieve 200-point increases in 2 months, and I've seen people who hardly deviate from their baseline score. It all depends on the learner and how much work he/she puts in.
Over the course of the Study Guide, you'll take several practice tests, and the results will give you a good idea of your score trajectory.
I hope that helps.
Cheers,
Brent
Brent Hanneson - Creator of GMATPrepNow.com
