I think this movie is genuinly terrifying at times
Now, I now this isn't exactly up there with the biggest movies in terms of story or production. But this is actually one of my favourite movies in the action genre. The directing is quite good, especially the action scenes which are always easy to follow thanks to good camera angles and editing.
But the main thing that I love is just that it scares me. Alot. Now, I usually don't scare easy, but this movie is of the kind that I actually sort of dread seeing certain scenes that I know are coming up. Because I know I have been scared by them before. When I say scared, I don't mean jump from the couch kind of scared, it's more of a uncomfortable feeling. I just hate the machines in this movie. That coupled with the straight-forward setup of the film makes it really easy to put yourself in the action and be immersed.
Anyways, I gave it a 7, just because I liked the great clarity of the action sequences, and because the machines give me the creeps.