I saw this because it was one of the last films Robin Williams made. And I would say that if you are thinking of doing the same, don’t. It’s just not worth it.
The concept is almost good. There is a guy, Henry Altmann (Robin Williams) who is totally angry all of the time. Then he is told by his doctor’s fill-in, Dr Sharon Gill (Mila Kunis) that he has a brain aneurism (true) and has ninety minutes to live (false), and he storms out, threatening to sue. So while he runs around trying to reconcile with his estranged son and distant wife and figures out how much he has messed up his life, she is trying to find him, and has his family looking for him. See, almost good. Actually, not even almost.
And the film is not even saved by the amazing cast – Robin Williams, of course, plus Mila Kunis, Peter Dinklage, Melissa Leo, Hamish Linklater, James Earl Jones, Richard Kind… but they cannot save it. I love your low-budget type dramas and the like, but this just doesn’t work.