Last night, I attended my first Suns game since moving to Phoenix in late November, so this was my first visit to US Airways Center.
It's definitely a smaller arena but it's clean and the staff is very friendly. Concession prices were around the national average ($5 for a pretzel, $8 for a Grey Goose + pineapple). I sat in sec 108, row 22 and thought I had a very good view of the game. Again, it's a smaller arena so I can't imagine there are really any bad seats.
Considering the arena was only around 2/3 full, the crowd was still loud and "into" the game (as in, people were there for the basketball, not to people watch or "to be seen").
It's a nice arena, don't get me wrong; it's just nothing special. Parking was DEFINITELY overpriced and it would have been nice if there were handicapped parking spots near the elevator (my mom's disabled and I didn't like that she had to walk across half the parking garage just to get to the elevator).
Sidenote: My review might have been affected by the game itself, which was also nothing special (I'm a hockey fan so it's hard for me to get excited about a regular season basketball game featuring two teams near the bottom of the Western Conference).