I got a 710 (5.5 AWA) on my first try back in May 06. While this was a respectable score, I feel that it is not an accurate depiction of my Gmat abilities for these reasons:
1) I didn't feel so good physically, maybe psychosomatic.
2) I drank an energy drink during the 1st break that I was completely not used to. I couldn't think after that.
3) The scratch pad really messed me up.
4) I put too much effort into the AWA.
I felt that the above 4 factors cost me at least 20 pts. In addition to addressing these (bought a scratch pad), I've put in additional studying. I am thinking about purchasing the Challenges as well.
I really appreciate the existence of Gmatclub. It's too bad I didn't use it before my first attempt. I want to urge everyone to keep up the great work, and I will give you an update when I get my second score!
Will