I just finished this movie. Depressing? For me yes. However, it's a story that needs to be told because there are many people like this.
Over the years I've done a lot of thinking about happiness. How can I be happier? Then I watch a movie like this and wonder how could I ever not be happy? My life is so comfortable. I would have to really screw things up for my life to ever be not comfortable.
I come away from a movie like this and certainly feel grateful.