It's too bad... i love these type of psychological thrillers. This one had all the right elements and a good story, but in the end the whole thing fizzled like a wet firecracker. The plot could have used some sharpening up, particularly the end, and better acting would have helped a lot, not least of which in the leading female role. Wes Bentley, in particular, was not used to his potential. The missing footage, that was cut to avoid an R rating, could have helped it, but wouldn't have saved it alone. In the end i was wondering whether the characters were better off alive or dead.
i recommend you go ahead and rent it, if you happen to like these type movies (Sixth Sense, The Others) but don't expect it to be nearly as good as those.