Ok, I'll provide the dissenting opinion. I actually love this movie. First of all, you have to take it for what it is: a sweet, badass movie. Its the type of movie you need to watch every now and again to relax and be entertained. Its like how you have to switch up from listening to Modest Mouse or Animal Collective to listen to the Kings of Leon every once in awhile. Its the type of movie where you think to yourself "wow, this is sweet. I wish I was these guys running from the cops, shooting up the mafia." And, some of the scenes are pretty original in addition to being sweet. And, I actually think the dialogue is pretty funny, but I only think its funny cause I like the characters. I could see how if you didn't like the characters, the dialogue could suck.
And, the acting isn't great, but there are definitely worse movies than this.