I've only seen concerts here, but I can say that the facility is top-notch as far as arenas go. The interior and exterior of the arena is attractive and there's def. more leg room than at US Airways Center, although you still have to stand up in your row to let people by.
Concession stands were fairly spread out and lines seemed to go quickly.
I went to see Madonna most recently - about a year ago, and the entry process couldn't have been more easy or more funny. This old woman security guard told all people, "Please prepare to open all bags for inspection that includes all purses, bags, and man-bags." Fortunately for me and you (and other self-respecting men), I've never been seen in public with a man-bag.