I rented "Creep" a couple months ago. And I loved it. It's one of the best horror movies, I have ever seen. I haven't heard a lot of horror fans talk about it. But this film will be a cult classic in 10 years. The movie starts a little slow but the pace picks up and runs away.
I HIGHLY recommend "Creep". Rent it or Buy. If your a true horror fan you'll enjoy this.