We stayed in 6576 on the December 18, 2005 Wonder cruise. I liked the location. Close to an elevator and not much hall noise. The only problem we had was the "creaking" when the ship was really rocking. It kept me up at night, even though we had a white noise machine on. I couldn't say it was coming from one area, just an annoying creaking noise. The toilet malfunctioned one day too, but they had it fixed pretty quickly.
Enjoy!