We have also had the best bus service at CSR! We've always gotten lucky and stayed in Casitas by the first stop.
Nothing really major, just a few things I didn't love so it's on the bottom of our list (I don't hate it and would probably give it another chance one day). It's so spread out and we found the layout confusing (I don't have the best sense of direction). I know CSR is also huge but it didn't seem as bad. I don't care for the layout of the pool - it was hard keeping up with DD unless I was right there beside her. She was several years younger then so probably wouldn't be much of a big deal now though. Also, I didn't find it relaxing at all, it just seemed hectic while we were there, more so than anywhere we've stayed. The food court, pool, bus stops, even the walkways were busy most of the time. I think part of it was that it had been a place we always wanted to try, and it just didn't quite live up to our expectations.