I really enjoyed this movie but it was far too short. It is intensely claustrophobic and when sitting in a dark cinema, I found it hard to breathe at times. The cinematography is very very good, if the storyline lets it down by being a little unrealistic. Hard to know what you'd do in that situation. Again, it does portray sharks to be horrificly scary beasts which I don't believe they are. Go see it, very enjoyable.