I was a little suspicious of this movie at first, because, well, that's just how I am. But was I in for a great surprise. It is extremely edge-of-your-couch creepy, but not with monsters with chainsaws and a lot of fake blood. This movie uses a method that is better, and possibly scarier. The suspense, creepy music, and sense of urgency and paranoia throughout the entire movie makes it that much creepier. I didn't guess the twist at the end, but then again, I'm glad I didn't. But watch this movie if you like this style.