I'll be honest, I wasn't expecting much. But we came for a work summer event to watch "Best of Second City" and I was so impressed! Super funny, and the actors were really good. I thought it was going to be a show, with one story line or something (you can see I didn't do much research upon arrival), and was pleasantly surprised to see it was a compilation of sketches (much like SNL).
One tip I can offer: Be prepared to be called up on stage!