As a sports venue it's top notch. The seats are comfortable and amply spaced apart, the reply screen is large and crisp and the sightlines are fantastic.
I've been to arena's in a few other North American cities and this is definitely the nicest. It's age (it was opened in 96 I believe) both helps and hinders it. It is in great condition but lacks a certain character that can only come with age, see: Madison Square Garden.
As a concert venue I pretty much hated it. It felt too much like a concrete playground and just killed the vibe.