My husband, son, parents, sister-in-law, niece and nephew stayed at AS Music last May.
We stayed in the Jazz building between the two pools facing a small park that led to the parking lot. You probably won't have much choice over your room location so be prepared for a walk if you are at the back of the resort.
The food court is smaller than the one at AS Movies but works pretty well. Definitely purchase the refillable mugs - saves a bundle.
The bus system works pretty well even though you share with AS Sports and Movies. Music is the first pickup and dropoff so you luck out there. The trip to AK is just about 5 minutes. The longest trip (about 15-20 minutes) is to MK. You are also within reasonable walking distance of a huge McDonald's. Be prepared though that since you are at a Value Resort the AS bus stops at the parks are usually the farthest from the entrance.
The pools were active all day long but we never ran into over-crowding.
All in all, we had a good visit. Rooms were clean, friendly staff, well-kept grounds as is par for Disney.