It is a performances centric movie

This is a tender, generous movie that likes its characters and presents them as real people, full of flaws and strengths.

It's funny, it's tense, it features two great performances from two actors and the director expertly creates a web of odd tension where you actually don't know what is happening for the majority of the run time.

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