To 17andacruiseaddict-I too was on the maiden voyage on June 4th. As far as different things to do. There is a Kareoke club, that was alot of fun. The promenade is bigger, with more stores/bars then the Explorer class. The Flowrider is a blast to go on, and almost as much fun to sit and watch. The cantilevered jaccuzis are wonderful, and sooooo big. And besides, she is the largest cruise ship in the world, for now. That was reason enough for me, the other stuff didn't hurt either. Good luck.
Lil' Lori Plus they have the most entertaining bartenders at the Boleros, I have EVER seen.