I just finished watching this one. I heard it was good, but was prepared to be disappointed. I was happily surprised when I thoroughly enjoyed it and was even the tiniest bit scared. Not only was it a horror moview, but it included one of my favorite scary elements, fear of the government. I am by no means a crazy conspiracy theorist, but I always believe there is so much going on that is not actually meant to protect us.
Anyway, Timothy Olyphant was good. I think he is a pretty underused actor. I am not a big fan Radha Mitchell, but she was not too bad in this movie.
All in all, I think I'd give it three bloody pitchforks out of four.