I saw this movie a week or two ago at the Seattle intl film festival and it was one of my favorites.
The characters were all very funny in a clumsy and idiosyncratic sort of way. Much like a Coen bros. movie plot they are a bit too dumb and small-town-naive to pull off their objectives without screwing themselves up, but that's what makes it funny, right?
The dialog was great as well, with a few funny Tarantino-esqe side narratives. In fact, the screenplay also reminded me of Tarantino or Guy Ritchie films as it jumped around chronologically and repeated some of the story from different characters' perspectives.
I imagine if you like those directors (well, who doesn't?), you'd find this one very worth your while as well (although a bit less stylized and certainly less violent then most of Tarantino's work which I happen to think is a plus!)