Fun premise, good actors, bad writing. This film seemed to have potential at the beginning but it quickly devolves into a trite action film. Ultimately it's very boring.

It is an exhilarating, distressing, funny and profound film, with one of the more memorable film scores in years,

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.

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