Just perfect...

If the ambition is to provide two hours of instantly forgettable, popcorn-munching escapism, it succeeds.

A film of deceptively outspoken contemporary relevance, this is cinema at its most alert, alarming and alive.

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.