The movie is superb. I watched it (twice) in a good cinema with good and loud stereo, and it makes a difference. The sound effects are awesome and I guess some impact must be lost on the small screen. It is a mixture of elements of sci-fi, thriller, drama, the road and even war film. It is very well directed, especially when hand held camera is used, and brilliantly shot. It contains some of the most convincing scenes of urban warfare I've ever seen. Acting is good - especially by Owen and Caine. The script, upon closer examination, has more to it than at first meets the eye, I think its meanings could be discussed even at psychology, religion or philosophy seminars. As usual with a very good film, it can be admired for a few reasons.