First off, if you are claustrophobic you may want to pour yourself a strong drink to numb your senses a little. I'm a claustro, and for the first ten minutes or so I was wanting to run a mile from the image of the man tightly contained in a box in the dark. I felt sick and almost asked my wife if we could choose another film. Thank goodness the effect lessened as the film proceeded. The story starts off as intriguing, and may have made a decent hostage/terrorist thriller IF it hadn't become clear after about 40 minutes that (spoiler) the whole thing was a security test. In my book, this is like a story that turns out to be a dream or the testing of a new mind-altering drug - a cop-out. The extra twist at the end does nothing to improve matters. All in all, good fun as long as you don't mind knowing it's a fix by the half-way point.
