It's hard to talk about this movie without spoiling it somewhat, but if you are a fan of horror movies and of shows like Buffy the Vampire Slayer (it isn't a vampire movie), you should give this a shot. You know almost from the beginning that is isn't your typical horror film.
I found it funny, bizarre and unique ... it reminds me of the original "Scream" in how it both honors and sends up the genre of horror films.
I liked it quite a bit. I'd give it a B+.