I agree with katluc. We (two seniors age 60's) did a Disney cruise without kids and we loved it! We especially loved the shows, which were awesome and among the best we've ever seen on any ship. There are plenty of opportunities to get away from the kids (i.e. nightclub, pool, private island, etc.) when we wanted to. Really like that they allow you to take your own alcohol and beer onboard (in your carry-on bags). It was funny seeing people pulling their rolling luggage with cases of beer attached to them! Cabins are very nice, entire ship is beautiful and clean, and staff is wonderful. We enjoyed watching first-run Disney movies, including Bolt in 3D, and getting our pictures taken with all the characters.
Their private island is very nice and there's something there for everyone. The adult-only beach is on the other side of the island with a beautiful beach and its own food and beverage service.
But so as not to paint an entirely rosy picture, we did not find the food very appealing. It was was okay and I know others will disagree with me, but in our opinion and in the opinion of many of our clients, it was just nothing special. We just expected better given the much higher price of a Disney cruise. I, and many others, were especially disappointed in the pizza. We did find the specialty restaurant to be very good and, should we do another one, we'll eat there more often.
Overall, it was a very nice cruise, as one would expect from Disney. We're glad we did it and will probably do it again, but only with our grandchildren.