We stayed at AS last Christmas, the decorations were similar to ASMu the year before...brightly colored, lit and plentiful. We drove up at night and there was a large tree and lights upfront...it was festive. I thought it set the mood well; the kids were very excited by it. Holiday music was playing in the lobby, and I think at the carport. More trees, poinsettias and decorated garland were in the lobby.
As I recall, the only decorations near the rooms were put up by guests who decorated their windows and doors. It was really neat. (And helped locate your room.) A LOT of people did it. Some even had large-ish artifical trees! All seemed to leave the lights on all night. After MK evening emhs we enjoyed, seemingly have the resort to ourselves, walking through it.
At Sports, we brought lights, garland and a big stocking after feeling left out the year before. (FYI, we used push pins.) If you have kids, at least bring a cheap strand of lights.
Also, in the hallway outside the food court, there were frequently cookies and cheap punch. (The lightly sugared Kool-Aid stuff that comes in gallon (milk) jug.) One time they gave kids the opportunity to make towel animals to take home!
I'd post pictures but they are trapped on the hard drive of another computer!
We are staying here with a gg this Christmas too. I picked it for the price and the bus situation. While not perfect, I feel like the other posters, that it is in the best spot at the All Stars.
My sister stayed at POP last year. While they had carolers in the lobby the couple of times I was there, I found it way too big with a too large of a resort feel. She had problems with the buses.