It is a performances centric movie

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 movie's neither hopeful in contrived ways, nor hopeless in different contrived ways. Somehow it manages to be wonderful

The thing I enjoyed most about the film is the fact that it doesn't shy away from being a super-sized-cliche;