Am I Missing Something?

Instead, you get a movie that's enjoyable enough, but leaves you feeling like it could have been much, much more.

I am only giving this movie a 1 for the great cast, though I can't imagine what any of them were thinking. This movie was horrible

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.