DD19 and I have used the spa at the Dolphin and Grand Floridian. We found them both to be very nice. I will say.....that the location of the spa at GF is "better" (in my opinion) than Mandara Spa (Dolphin). Mandara is right next to one of the hotel elevators. The lobby is huge and noise really echoes. Even when we were in the inner part of the spa, we could hear kids screaming next to the elevator. This kinda defeats the quiet, relaxing atmosphere you expect when visiting a spa. The services were fine, the location was not.