It was not a great movie. Literally every action was predictable or an immense foreshadowing of an upcoming event. I believe there could have been a better selection of actors too. To say the least, the movie cooks up a new interesting idea, but it did not fulfill my expectations. The movie most defiantly did not live up to its trailer.
I went with a few buddies and one of them is a "realist." He did not shut up throughout the whole entire movie with comments like "the government would never do this." I heard others saying the same. Do not try to view the movie from a realistic point of view. Also, I wouldn't consider the move scary at all. It did pack somewhat of a thrill, but like I said; it was too predictable.