Just caught this last night. To me, it works the way a supernatural thriller should work. To me, terror is not about gore, but about the things that go bump in the night. And boy, in this movie, do they ever go bump! I didn't get quite as creeped out as I have by a couple of other movies, but this did have me looking over my shoulder a bit while walking through the dark afterward, and assuring myself that the thing walking into my bedroom and jumping on the bed was really just my cat.
Once in a while I got pulled out of the movie, wondering why the camera would have been capturing this or that moment, but I just let it go and let myself get back into it. I think the director made only one serious mis-step, in my opinion, just a few seconds near the very end; it was a moment that seemed sort of cliche, and definitely reminded me I was watching a movie. Just snipping out a few seconds would lessen the chance of snickers or laughter from the audience and greatly improve the leading into the finale. (And I'm not going to say what it was, because it could be a minor spoiler.)
Once in a while I got pulled out of the movie, wondering why the camera would have been capturing this or that moment, but I just let it go and let myself get back into it. I think the director made only one serious mis-step, in my opinion, just a few seconds near the very end; it was a moment that seemed sort of cliche, and definitely reminded me I was watching a movie. Just snipping out a few seconds would lessen the chance of snickers or laughter from the audience and greatly improve the leading into the finale. (And I'm not going to say what it was, because it could be a minor spoiler.)