We've taken our kids to a few shows here, Disney on Ice, that kind of thing. Those were fine, the sound wasn't much of an issue, and since they're moving everywhere you pretty much got to see everything that was going on.
Concerts however, are just okay. I love music and will gladly see a concert there if someone I like is playing. However, the sound quality isn't great, and depending on your seating, you can have a terrible view.
Parking is usually expensive, but that's to be expected. Staff is pretty good about keeping it cleaned up during events, especially considering 90% of the people there seem to be slobs who toss their garbage on the ground rather than walk a couple feet to a garbage can!