It's decent, but not great... apparently a lot of the humour is American-Canadian based though, so I guess it wouldn't appeal to me as much as I'm an Australian who loves British comedy.
My main annoyance is the characters lack depth. I mean, even Family Guy and South Park characters are deeper, and they're pretty much two of your main immature comedy shows. Unless I don't watch it enough to see that third dimension, but I dunno.