I'd have to give 3 stars to any music venue in Scottsdale, simply because it exists.
But the Kerr isn't terribly comfortable or attractive. So don't expect much. It's a very small place, and you'll likely sit on aging folding chairs (that are at least cushioned.).
My biggest gripe is the lighting. Harsh overhead lights shine on the audience, and they are very glaring and unattractive. Yes, I appreciate that Kerr is part of ASU and budgets are tight, but they are charging a fee for tickets to most of their performances. So they should put some attention on improving overall aesthetics for those who attend.