Let me start by addressing one very big myth about this ship. The pre-conceived notions it is too crowded can not be any more false. Embarkation/disembarkation were the easiest I have ever experienced.
Once on board, the ship is so large and so well organized in to "neighborhoods," no one area gets two crowded. The only time I experienced corwds on this cruise were during events like the 70's street party. But that is an event that brings crowds on any ship, and it's the crowd that makes it so much fun.
The entertainment was the best I have ever seen. Do not miss a single show. Make sure you make the proper reservations before your cruise.