My personal review
I am going to start off by saying I am a huge Kevin Smith fan. I own every movie that he has made, (excluding Red State) including Cop Out.
That being said, is it the greatest movie ever made? Of course not. It has some moments that are funny (most of which that were in the trailer). But... is it the worst movie ever made either? Not by far. I'd call it a 4/10. Could it have been better? Of course it could have been. But it's a good solid cast. I think if Kevin Smith had written parts of it, it would have been much better.