Though we're 60+ and were taking no children with us, we chose this cruise because we thought we'd like having the days at sea to enjoy the Disney experience and we were not disappointed. We booked air through Disney and they make the process from the airport to the ship and ship to airport very easy. We especially liked not having to pick up our luggage at the airport...Disney handled it and our bags were in our room well before dinner. We had a verandah cabin and it's the first time I've had more storage space than I needed. We also liked the split bathroom concept.
We were impressed with the cheerful attitude of every crew member we encountered. Didn't matter if they were officers or maintenance staff they all greeted you with a smile and a friendly word and they all seemed to genuinely enjoy their job. Our table hosts, Romain and Oscar, were outstanding and the dining room staff worked together and helped each other when needed even it it wasn't their table...great teamwork.
The entertainment is probably the best at sea from the 3D movies to the stage shows which have extravagant costumes and sets. Also, encountering Disney characters as you travel about the ship is lots of fun.
No matter what your age I'd definitely recommend a Disney cruise.