All three resorts were very clean - both rooms and public areas.
Service was great at the Disney resorts, and pretty good at HRH, although some people there are a little flip. Overall, no big complaints, though.
Convenience:
AKL: great bus service - no complaints. A bit of a haul to the MK, but we only went there once, so it didn't bother us. Mara is a nice fast food place with good variety, which is nice. Open late, too - I think until 11:00.
HRH: very short walk to Universal Studios, and a bit further to IOA. We went to eat at RPH and took a complimentary shuttle bus, which was nice. No fast food place, but you can get food to go from the Sunset Grill without much of a wait and no room service charge!
YC: we were only there one night, but have stayed at BC before. Great convenience to MGM and Epcot World Showcase. Continental Breakfast is available in the lobbies of the YC and BC, which is an improvement over the last time we stayed at the BC. They still could use a quick service restaurant other than Beaches and Cream. Can't comment on busses, as we didn't use them.