I like this place. I've been here about 5 times in the last year, and I have to say that the Improv definitely draws better talent, but the Comedy Spot wins out on price, intimacy, and waitress service, plus the talent is still pretty good.
That said, I've stopped going there for a little while because I didn't see any new opening acts on visits 4 & 5 that I hadn't seen within the first 3 visits. It's probably a good place to go once or twice a year, but there's not enough variety to go there too regularly. If I'd only been there once, I'd probably have given the place a 4th star.