An excellent film.

Rating: 10/10 (6 February 2008)

First things first, the movie does not reveal all the information to the viewer in the film. Either you need to watch the movie closely in order to derive some of what is going on, or you need to surf the internet. That's right, you heard me; the movie uses something called "Viral Marketing," which is when you find out a whole bunch of information about the plot over the internet.
Now for the movie itself.
Many people complain that the camera wouldn't stop moving; well, it's supposed to be a hand held camera the whole time, so it wouldn't make sense for the camera to stay still if it was hand-held, would it? And many people rate the movie down because it made them sick. Look, even if it makes you sick, that doesn't mean it's a bad movie. It just means you get motion sickness. Live with it.
And it very much had a plot, if anyone is curious. It's actually incredibly deep, but like I said, you need to do some research to fully understand the plot - which is quite in depth.
My overall rating: Very good, tense monster movie, but obviously not for everyone.