The merit of this movie is that confronted grief, and tried to do so seriously. We know that in daily life, it is hard for any human being just to grief or talk about loss. When I read the critics I see that they have praised this fact but have mentioned that the movie didn't know if to be a comedy or a drama.
Grief, life and humor are intertwined in real life. I am no saying that Jennifer Aniston ruined a masterpiece about grief or that the movie didn't have other faults but wherever she is "being herself" (which is Jennifer Aniston over and over) with her fidgeting, her usual getting stuck to pronounce words or express herself,the usual movements of her head like saying hello?? Her superfluous acting, her not getting deep in any emotions, when all this happens any other efforts are cheapen out. She makes everything around look light, silly, frivolous. And for more than others feel what they do and believe their characters , she doesn't seem to have any fiber on her. The only movie when I saw a different performance of JA was "The good girl" but nothing else after that.
I was moved by a concept conveyed here: "all these counselors and people that tell us what to do and they haven't examined themselves". That is important. Or the guilt issue which always accompany any grief. When Walter said "I couldn't hold him" this might seem very simple but convey these little details that stay with people when they lose someone and start thinking what they might have done different. And there is little comfort. Aaron Eckhart has this warmth about him that makes him believable. I understand if people don't like the movie, but I think that they tried and the casting of JA didn't help in this effort.
It is worthwhile to mention Martin Sheen and John Carroll Lynch as very convincing and effortless performances.