I was extremely lucky to see him in Las Vegas on December 10th, 2010. I was only 4 or 5 rows back, the tickets were $250 each. It was a really amazing concert, and he was quite funny the whole time, skipping across the stage, et cetera. The music was also great. I wasn't as much into sound back then as much as I am now (Sansa Clip+ and Panasonic RPJ900s-quite good still, IMO.), but I think the sound was VERY good. Not too loud, just a nice concert level. Maybe 90-95 decibels. Very enjoyable experience, one of my favorite ones in life.