Although it has its amusing moments, in eneral the plot does not convince.

I was totally surprised at how great this film.You could feel your paranoia rise as the film went on and as you gradually learned the details of the real situation.

Simple and well acted, it has tension enough to knot the stomach.

It's the kind of movie you'll want to see a second time with someone who hasn't seen it yet, to remember what it was like to watch it for the first time.