Good story, Not enough for a whole film

I wanted to like it more than I actually did... But much of the humor totally escaped me and I walked out only mildly impressed.

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.

Strong acting helps the film overcome an uncertain premise and create characters that hold our attention absolutely.