I've been a huge deadmau5 fan for about a year now, I have seriously been looking forward to seeing him for months.
He didn't let me down- not only is he an amazing producer, he's a fantastic and engaging dj and a really nice guy who took the time to actually talk to me.
http://www.youtube.com/watch?v=uNTmuPoBET8
If you get the chance to see him, whether it's ultra or coachella or virgin music festival, DO IT.