My wife has taken me here a number of times. The opening acts are usually good for a few laughs.
I remember watching Russell Peters there. He was HILARIOUS!
Dave Attell was really funny too.
The Tempe Improv staff is great. They get you what you need in a timely manner. The food is good. You really can't expect much from a comedy club, as far as dining goes, but their food is very above average.
After the show, the comics usually hang out by the bar, and really interact with the fans.
Tip 1. Go to the bathroom before the show starts.
Tip 2. Don't heckle the comedians.
Tip 3. Be nice to your servers and tip them well.
I'd definitely go to The Tempe Improv again. In fact, I'll be there in a week and a half to see another show with a few family members.
Get some comic relief in your life.