This is the most suspenseful movie I have seen since Spielburg's "Jurassic Park." If every film had the talent and experience of Craven's direction, the stunning acting ability of McAdams and Murphy, and the articulate sensibility of Ellsworth's writing, more and more movies would be made like this. Grade A, and very unexpectedly GOOD! Watch out- this just may be a sleeper hit, perhaps even bigger than "Mean Girls" was last summer- and deservedly so. Murphy and McAdams have such chemistry- you can tell each really enjoyed making this film. Those are the best kinds of movies- the ones where you can see, either because of excellence, sincerity, or ease, the joy with which all the filmmakers took in producing what you are watching. Enjoy this film! You're in for a ride.