A few complaints:
It wasn't entirely obvious to me where we were supposed to pick up the hard copies of the presentations for our AM classes (the PM classes are only done on CD). I've found it now, but either somebody didn't mention it to me during registration or I completely missed any signs indicating where it was located.
I'm not sure whose bright idea it was to locate the meeting rooms adjacent to what appears to be freight elevators. It was not unusual to have a session interrupted at times by loud noises from people moving heavy equipment. I don't see why the hotel can't wait until lunchtime or after hours to move equipment in that area if they know a conference is going on.
There was a similar issue during the keynotes, as the breakfast area was directly adjacent to the room where the keynotes occurred. Apparently the hotel did not mind making a significant amount of noise cleaning up after the breakfast and moving equipment around during the middle of the keynotes.