I'm with LvsTink on this one. The AKL is the best concierge experience at WDW, followed by the Polynesian, and then the BWI.
The AKL staff is wonderful, the extras are the best on property, and the resort is absolutely breathtaking.
The Polynesian is very kid friendly, and the lagoon view rooms have a view that can't be beat.
The BWI has a more intimate feel with a very doing staff.
Any of the three are wonderful, although the AKL probably offers the best value for the money.
The downfall compared to the others is the location. If you have younger kids the Polynesian might be the best bet for you.
Anne