We have been the last two Septembers. In 2007, we were there September 1through 9. It was very crowded at the Magic Kingdom late afternoon/evening on Sunday, the 2nd, but it was Labor Day Weekend. Every other day we basically walked on most rides in under 10 minutes (the exceptions being Splash Mountain because of the heat--every one wanted to cool off and Soarin'--and for those we waited no more than 30 minutes. We did find the restaurants very crowded because of the Free Dining. But we had ADR's for every restaurant and we were seated within five minutes of our ADR time with the exception of Boatwright's where we waited over 45 minutes (and then had a really bad meal).