Spoiler: If the father had just put a bullet in the head of the criminal AFTER HE KNOCKED HIM UNCONSCIOUS FOR MINUTES, a guy he knew had no compunctions about slaughtering his family, everyone would have lived. How dumb can you get? God that pissed me off.
NO way for the faint of heart. Jaw dropping moments abound within this film, and you care so much for these people, their faults aside (trust me, at one point you'll hate one of the protagonists for being a total ditz, but hey, you can't avoid that, its a horror thriller). Easily one of the scariest films i have ever had the privilege of seeing, and it's definitely an experience worth enduring if you're a fan of the genre.
Good performances all round.