This movie is thrilling and so emotional that i think you should be mentally and emotionally old enough to actually be able to understand the true meaning. To understand how someone goes through a mental illness is not for any 'sane' person to understand. Although the hard work put into the movie does justify some aspects of it, the movie as a whole does not tell the truth. I think that the movie skips very important parts of the story such as the time David spent in the mental institute, and we do not get the understanding that he has moved from America to Austrlia. THis is what i believe watch it and see for your self!