This movie is very captivating and carefully crafted. It is built on subtlety which is how the best horror films come about! It doesn't depend on gore, or special effects, so it is not for the those of low attention spans. It has a simple but well played story that sends chills down your spine! Personally it didn't scare me as much as it seemed to have scared other people, but it is definitely creepy and you will get caught up in the fear, anxiety, and paranoia of the characters. Well worth the watch!