In thrillers, if you can easily predict the ending then the fun is destroyed. In this film you can predict the ending but still the story keeps you strung. So at each moment you have a feeling that the movie is going to end, but it won't, because the end you thought is yet to come. What makes this film watchable other than Al Pacino is its chilling chase sequences in the foggy waters of Alaska. The close-up shots of the actors and of movements of hands, eyes, etc were prominent. The location of the shoot totally echoed the sort of uncanny and lonely feel it needed. The way Pacino's character changes and his inner conflict is related to Insomnia, which is prominent right from the start and he shows signs of physical deterioration which grow with the moral burdens he is carrying throughout the film. Also I think Robin Williams and Hillary Swank were brilliant given the time they got.
