my 2 cents:
if ure bent upon joining a classroom session,
Manhattan GMAT (
https://www.manhattangmat.com) might be a better choice. From what I have read here and on other forums, their prep material is really good. Before u start prepping, I would suggest that you read some posts in the "Share Yr Experience" forum on this website and decide what will work for you. Due to the wide range of study materials available, its very easy to get on the wrong track. Needless to say, its very frustrating...
btw, this year, Kaplan has experienced a significant decrease in the GMAT enrollment in the US. This could be due to the improving US economy or due to increased competition in the test prep sector.
hth,
pjk