Unshakable, witty and deeply felt, the film will be paying emotional dividends for a long, long time.

One of the most extraordinary films you will see this year. Take that as you want.

The film never slows down or bores, plunging from one harrowing sequence to the next.

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?