The good the bad and the ugly?
Sounds like you've heard the good - buses were pretty prompt. They kept track out front of the buses arriving, so were always able to tell us (if we just missed one) when the next was expected. Usually 15 minutes at the most. You are VERY close to MGM and Epcot. MK is the farthest.
We were in the 80s, and also VERY short walk to food court, bus stops. That was nice.
We've never stayed in moderates, but Im sure you get what you pay for. The rooms are small, but we had two rooms for 5, so its was nice. The fact that it is so new is extremely nice because I like things CLEAN, and it was very clean.
The food court was nice, although we only bought things "to go". Bring your own hair dryer. The pool areas are big, we didnt notice noisy kids because its cooler in January and peolpe weren't swimming as much! As for large teen groups, they still try to place them at the All Stars, from what I've read on these boards they have the check in services there for large groups.
I think they'll have a good time. Hope you enjoy!