I know you've had lots of replies but I thought I'd add my 2 cents.
With or without kids Disney has some of the best customer service around. I've done Disney 2x with my 21yo dtr and 8yo son. My daughter and I did an "adult" vacation the beginning of this summer and went on the Grand Princess. We were very disappointed!!! The rooms weren't as clean, the food not as good, the employees not as attentive, the private island-beach wasn't anything like Castaway Cay--they sand was very rocky and you couldn't go into the water without shoes on. Even the shows weren't as professional, although they were more adult. About the only thing another cruise has that Disney doesn't is a casino, if that's important to you. I don't think you'd be disappointed in Disnay at all. My 21yo said she'd rather go Disney again. Just my opinion!
With or without kids Disney has some of the best customer service around. I've done Disney 2x with my 21yo dtr and 8yo son. My daughter and I did an "adult" vacation the beginning of this summer and went on the Grand Princess. We were very disappointed!!! The rooms weren't as clean, the food not as good, the employees not as attentive, the private island-beach wasn't anything like Castaway Cay--they sand was very rocky and you couldn't go into the water without shoes on. Even the shows weren't as professional, although they were more adult. About the only thing another cruise has that Disney doesn't is a casino, if that's important to you. I don't think you'd be disappointed in Disnay at all. My 21yo said she'd rather go Disney again. Just my opinion!