Boring, long, and too preachy.

The thing I enjoyed most about the film is the fact that it doesn't shy away from being a super-sized-cliche;

Strong acting helps the film overcome an uncertain premise and create characters that hold our attention absolutely.

Just intense enough to provide a much-needed diversion, just lightweight enough to make you forget about it soon after it’s over. It’s not exactly “good,” per se, but it does what it sets out to do in terms of putting us on edge, which makes it … successful?