This movie is so thought through, and so beautifully written, directed and edited, that you simply cannot watch it through, without ever jerking your whole body in fear, at least once. It has every scare element in it, and they all work to their very best.
The acting and the directing was extremely well done, considering this being a very low budget movie. Only one actor (in my opinion) didn't act above an eight out of ten, the rest did their job so well, it almost seemed like a documentary of real people.
The movie itself is also very affective. I'm, for one, glad that we don't have any subways in my city, I'm not gonna go down there, any time soon, and I'm sure as hell not gonna open, if Jehova's witnesses come knocking at my door, within the next few days. Any face-to-face contact with any Christians in the near future, is out of the question. You'd see me running away from them, before I'd stop up and chat with them a bit. Especially if they were holding a big silver-ish cross!
Be sure to have visited the toilet, before watching this movie. Three reasons: 1: You may wet yourself if you don't! 2: You don't wanna miss one second of this movie. 2: You are not gonna dare leaving the room, for a short while!!!
All in all, this movie is an almost-masterpiece. The full story in itself, is well made, and the first 20 minutes are 20 minutes of masterpieceness, but the rest of the movie, isn't containing a whole lost of those things, that made the first 20 minutes a masterpiece, so therefore the judgment, almost-masterpiece. Don't get me wrong though, the movie is excellent, from the beginning to the end. This is one and a half hour, you simply do NOT wanna miss out on.