Yeah it is a sad movie, but i sometimes like that. It is fun at times but for the most part it is a tragic tale. I wouldn't suggest this film to anyone that is already feeling down. I suspect this is a big part of the reason why it ended up with a PG13 rating because some of the topic matter is probably not things you would want to expose really young kids to... that and the sometimes terrifying (to a 4 year old) imagery.
I still think it is worth seeing though.