This film is like catching lightening in a bottle. The action is visceral and entertaining, the story keeps it simple yet engages you and the protagonist manages to seem likable without doing anything out of the ordinary to make you feel that way. My biggest complaint is that this came out about the same time as a film that had almost the exact same plot. I'm not sure which one borrowed from who. Luckily both films are enjoyable watches.
Horror films oftentimes leave you bored halfway through because they spend so much time trying to get you to understand why you should care about what is going on. This movie manages to keep things moving and still get you to care about what is going on. The character fell like real people and you instantly care for all of them, even the characters usually relegated to support or the ones that would be considered evil.
Genre fare at it's best. Going into the movie I wasn't expecting much, but actually was surprised that two scenes moved me emotionally in ways films of this type usually don't. One scene was remarkably touching and the other actually had me laughing out loud. For a film whose main goal is see how much violence it can get onto the screen I felt that was quite an accomplishment.