Now, if you know all the rules for surviving a zombie apocalypse, this movie will make you roll your eyes. That said, it is presented in a comedic tone, which makes it a little easier for the nitpickers to pull the cold carrot out of their rear end for 90 minutes.
I laughed, I jumped, and some stupid bimbo screamed several times. Gross-out factor was about a 6, though your experience may vary. (I think I gave Hostel an 8, but that may have been as much for the gratuitous sex as the blowtorch scene.)
I stayed till after the credits and was rewarded with a fun outtake tidbit. If you're a fan of the famous person whose house our heroes end up squatting in, you'll get a kick out of it. (Not really a spoiler there, but more fun if you don't know who it is!)