As it has always been, it's the small things that make the Disney difference. The Fantasy is an incredibly beautiful ship, where Disney touches abound. They didn't cheap out on anything on the Fantasy. The food, service, shows kids' clubs and staterooms were all top-notch.
The Fantasy's biggest strength in my opinion is ambiance. From over-the-top bathrooms featuring mosaics of bullfighters and flamenco dancers to the custom carpets and artwork featured around the ship, the Fantasy is unparalleled if you like details. We were particularly impressed with the theming at Cabanas, the lido deck buffet. It features a full-wall Finding Nemo mosaic that is truly beautiful.
Also strong (as expected) is the service. These cast members are trained impeccably. I can't think of a single encounter I had that wasn't exemplary.
Plenty of storage, verandah was nice to have especially in the morning. Like all staterooms, it felt small compared to, say, a room at Walt Disney World. The bed was EXTREMELY comfortable and we slept well.