It's no definitive masterpiece but it's damn close.

It's hard to see any effort in the film. There's no comedy to speak of, no real drama and, worst of all.

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?

The film's masterful storytelling did its job. The message was clear. No need to overdo.