We were there Sept.1-8th and it was great. The weather was unexpectedly wonderful (way less humidity than I expected). I was prepared for the worst & got the best. We had 2 afternoon showers the entire week. Both times we were at MGM and the sun was back out after about 30 minutes.
Lines weren't bad at all, except for MK, and we took advantage of the EMH there. We rode ToT literally over & over again. After about the 8th time I said it was time to move on. Did not have to use the fast pass very often. We did us it for EE & Thunder Mountain. Most waits for the rides were 20 minutes, or less.
The free dining is what brought us back. It was the first time using it & it was fantastic. I would go back again in September for free dining, but think I'd go later in the month. I think it was a true miracle that the weather was so great. Don't want to push my luck