I have to disagree with Chris W., because I think that the Phoenix Improv Festival is no where near the quality of Chicago's Sketchfest. However, the prices are more than fair: how can you beat three performances for $15.00!? That is cheaper than a movie, and SO MUCH more fun!
I attended both the 7 PM and 9:30 PM shows on April 18, 2009 (for a total of six performances), and without a doubt (and of no surprise to me) I was most pleased with WeirDass. Most of you will know Stephnie Weir from MADtv. I was doubly pleased because I had not expected any, what I would call, "headliners."
Though I think there is a huge opportunity to market the Festival to the masses that is being overlooked...all in all, I think the Festival has the potential to become great.