I've only been to about 4 convention centers in my life, so I don't know how much my input can be taken.
I thought that it was just ok. The rooms were designed great, but the setup and acoustics were awful. The sound folks really didn't know what they were doing and the video folks were fumbling around trying to get the powerpoints loaded.
On top of that, there were 8000 attendees all yelling for water, and the most Mandalay could do was bring water coolers out in the hall ways with 6...yes 6oz cups for people. What did they think we were going to do? sip the 6oz cups? or maybe keep disturbing the speakers as we got up to refill 6oz over and over? huge fail.
Food Catering from them was good during our lunch event.