We are veteran cruisers and were dubious about a ship this large. This cruise had 3900+ passengers with 1300 "junior cruisers." The water park features certainly satisfied many of the younger set.
We were in a balcony cabin. It was very modest in size. The balcony was about 50% of the cabin size. Beds were short. Both of us are 6' and over and our feet plus some hung over the edge of the mattress.
I was most disappointed by the movement away from the all inclusive model of cruising. While the number of dining and entertainment venues is large, most involve an additional fee. None, including the Cirque du Soliel dinner were worth the expense. While the entertainment was entertaining, the food was forgettable. Fortunately, the portions were minuscule so there wasn't much to forget.
Don't care for the cabin layout. One way traffic, no standing in travel lane. Good location near the forward elevator bank. Only for and aft elevators, none midship.