Saw this last night at the dollar theatre (thank god). I read the reviews, I listened to the people here on BL, and I was let down. I just kept waiting, and waiting, and waiting for it to "get scary" and it never did. Apparently my idea of scary is a little more complex than others.
I didn't like how whenever an infected zombie attacked, the entire sequence was hard to see. The camera moved too fast, it was just too chaotic to look at. In fact, it gave me a headache. Some camera distortion and rapid framing is okay, but this was over board.
I liked the music in this movie, very cool. Classical to metal and back. It played along nicely with the action. I probably wouldn't recommend this to any of my friends, unless they go watch it for .50 like I did. I think I've had my fill of hard-to-understand British accent, too.