My wife and I had been wanting to take a cruise for some time, but only recently decided to take the plunge. We are both fans of Disney, and have had great experiences with (and expectations of) their resort experiences, so we had high hopes - and high expectations - for DCL. The opportunity to sail on the brand new Disney Fantasy was just too good to pass up.
We didn't have much idea what we were getting into as a couple traveling without children, and some of the reviews of the Dream gave me pause, particularly regarding adults-only areas. From the moment we boarded the Fantasy, it became clear that DCL had heard the feedback regarding the Dream, both positive and negative, and used that to improve the Fantasy. The adult pool areas were quiet and didn't feel crowded, and the "Europa" club district was lively and entertaining. We loved it.
Much has been made in other reviews of the food, the cost, the activities, the embarkation process, etc, so I won't rehash what's already been said repeatedly. For us, we came aboard expecting an environment and level of service worthy of the Disney brand (my wife's brother had been a cast member at Disney, so we were well-versed in what's expected.) DCL somehow managed to exceed our high expectations. The attention given to detail on the Fantasy is remarkable, even by Disney standards. The ship is elegant, yet family-friendly and unmistakably "Disney." The crew were patient, friendly and attentive (in fact, in what sounds like is an aberration, our servers were still friendly and smiling on debarkation day, and we did NOT feel rushed!) All in all, we were blown away both by the ship and by the crew.
For us, the biggest letdown/waste of time/whatever was the ubiquitous jewelry shopping seminar. I know it's a source of revenue for the cruise line, I know it's part of the whole deal, but those seminars really are just a waste of time that could be spent otherwise (un)occupied.
All in all, though, we were absolutely enthralled with our cruise, and would strongly recommend DCL at least to anyone who is a fan of Disney.