During several of our vacations to Disney World, my family and I saw The Dolphin Resort from the ouside, and we also stopped in a couple of times to scope out the inside too. One year, after learning everything that it had to offer, we agreed that we'd all like to give it a try. 12 months later, we checked ourselves in...
Even though The Dolphin Resort is located on Disney property, it is not owned or operated by Disney. That may have been the reason that I found it to be a little bit less "Disney-themed" than some of the other resorts we'd stayed at. Some people might think that's a positive feature, but to me, I found it to be a slight drawback. I guess it just depends on your preference.
We found our accomodations to be very nice, and the staff treated all of us the with the same friendliness that we'd experienced at the other Disney resorts.
As far as features are concerned, I definitely feel that the best feature of The Dolphin is its location. We were within an easy walking distance from EPCOT, The Disney/MGM Studios, and one of Disney's miniature golf courses, and it was also very close to several of the other resorts, like The Swan, The Yacht Club, The Beach Club, and The Boardwalk. Since we didn't want to spend all of our time hanging around our "home" resort, it was great to have such a wide variety of options in very close proximity. Also, like the other Disney resorts we had stayed at, The Dolphin had several methods of transportation conveniently available to take us anywhere else that we wanted to go.
For the days that we wanted to relax close to our room, The Dolphin offered many of its own options for recreation, including a couple of pools and hot tubs, a fitness center, game room, volleyball courts, and more. In addition, it also had a wide variety of restaurants and eateries, so we didn't have to leave the property when it came time to eat either.
Overall, I felt that The Dolphin Resort was very nice, but if you're someone that wants to immerse yourself in as much Disney-themed fun as possible, some of the other resorts might offer a slightly better experience. On the other hand, if you're really just interested in having a nice place to sleep that's really convenient to many of the other attractions, and also one offers a bunch of recreation options of it's own, The Dolphin may be for you.
If I was given the choice, I probably wouldn't go out of my way to stay at The Dolphin again. However, if that was the ONLY Disney resort available when I was taking my vacation, I'd be OK with that.