I first experienced The Pearl when I came here to see A Perfect Circle in December of '10. It's a fantastic venue - very intimate, with great sight lines, and superlative sound.
I can only speak for the experience from the general admission area but that is how it was...I wouldn't hesitate to see another concert here again ever. It was fantastic.
I do recommend coming a little early and visiting one of the casino bars as the service inside was fairly slow.
As a side bonus you can gamble after the show...who wouldn't want that?