I can see people will either love or hate this movie, depending on your own experiences and loves. Its basically about a incredibly obese police officer coming to terms with his own mortality (he is given a year to live at the start of the movie). It has other bits and pieces in the plot (love, mystery etc), but these are not the central ideal of the movie.
I found myself crying in many parts of this movie, for myself being fat (and have been my entire life... of course not to the degree of the main actor, but to a degree which has caused bullying my entire life) this story hits very close to home. And some of the subtle emotional behind the scene's stuff here definitely adds to the mood.
Anyone who has had any sort of eating disorder (over or under eating whatever) will recognise things in this movie, and will more then likely be in tears by the first 30 minutes of the movie.