Our third Disney cruise - second of the 7 night variety. I'll start with this, the 7 night and the 3,4,5 night cruises are very different, and there's really no comparison. If you can swing the 7 night cruise, do so. It's better, by far.
Disney does 2 things at sea better than any other line: 1) move people and 2) occupy and entertain children. The service is unparallelled in family cruising. If you have any sort of problem, just say something, and it's immediately attended to....
The trouble with the shorter cruises is that people cannot relax - passengers or crew. With the 7 night, there's a point at which you finally start to really breathe and take it in.... and the crew seems less rushed to pack it all in.
Nice location, not too noisy. Adjoining room with 7504 which was great as we traveled with grandparents. Clean, well maintained, and large enough for all four.