Pioneer has it right, there aren't many differences. I love POP and will stay there with extended family in September. In favor of the AllStars, whichever you stay at, you can easily walk to the others, and they are all themed really well. I stayed at Sports while they were still building Music, then again in '06. In 'o7 we stayed at Music and loved the quiet pool that was right outside our door, like a private pool in the early morning. Then in Jan '09 we stayed at Movies and a night at POP. In Dec we stayed at POP. Pop is bigger, mostly because each building has an extra floor. The buildings are laid out so the furthest is closer to the bus stops than the furthest buildings at the AllStars. My favorite mousekeepers are at Music, plus they have the main pool themed to The Three Cabelleros. POP has the best, but busiest food court.