The New York Times has a mixed review and calls it "an expertly manipulated exercise in psychological horror". Rolling Stone says, "Director Brad Anderson tightens the screws of suspense, but it's Bale's gripping, beyond-the-call-of-duty performance that holds you in thrall."
Empire Online concludes, "It looks and feels the business, both in Bale's bone-bag of a body and the morphine-dosed-Kubrick vibe, but it's more a tightly wrought slither through pastures old than fresh investigation into the claws of madness." Roger Ebert gives it 3 stars and says, "The director Brad Anderson, working from a screenplay by Scott Kosar, wants to convey a state of mind, and he and Bale do that with disturbing effectiveness." Rotten Tomatoes has a critics rating of 77%.