It is not deep, but it is fun to watch. It does have a bit more of an edge to it than other similar films.

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.

By the time the dramatic fireworks start popping off, each one feels earned.

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