I have no problem with Dane Cook. He's as funny as any good stand-up comedian out there. He's overrated though. It's not like his stuff is all that different or unique. Just louder.
It's just sad that probably twice as many people have heard of Dane Cook than have heard of Mitch Hedberg, who was probably the best stand-up of the last decade. And hardly anybody I know has watched any Steven Wright acts.
I like Dane Cook a lot, still. I wouldn't avoid or be biased toward a movie because he's in it by any means. This one though.... the concept was pretty clever but from what I hear it's supposed to be one of the worst movies of the year. That's why I'm passing.