We traveled on the Disney 4 night cruise with 2 stops at Castaway Cay and one stop to Nassau. We loved it! My children, ages 11 and 12 had a wonderful time and cannot wait to go back! They really enjoyed the Oceaneer Lab. We saw Toy Story the Musical which was wonderful and the "Enchanted Dreams" musical which was wonderful also. The Disney level of service is excellent! With this being our first cruise, I was worried about sea sickness, but we all did great! The ship was very smooth when sailing. We did the Atlantis Aquaventure excursion in Nassau. Atlantis is very beautiful, BUT, it had a very bad, fowl odor around its ponds. The odor was so bad that I got sick while eating lunch. The water park was nice, however, we noticed sand bags at the bottom of some of the pools. It didn't look like maintenance was too high on the list. The food there is very expensive ($5 for a can Coke). You cannot use any cash there, only room key or credit card. We probably won't do that excursion again.
Castaway Cay is paradise and everyone had a great time there!
A couple of recommendations - On Embarkation Day, if your children are eager to swim, let them wear their bathing suits right on the ship. That way, right after the buffet lunch, they can jump right in! An extra electrical cord came in handy for us, and we also brought a lighted alarm clock. Get ready to spend some money on pictures!! Disney photographers are everywhere and take some really great pictures. They are worth every penny!
Cabin seemed small at first, but is very functional and we really enjoyed it.