I couldn't help liking this movie. Sure, it had its issues. It wasn't as funny as it could have been (although I laughed very hard at times, especially in the sky-diving scene). It's kind of morbid since it's all about facing the certainty of death and going on laughing, but it's still a wonderfully fresh movie about discovering the joy in life. Freeman plays religious characters so well, I was shocked to discover that he is apathetic towards religion in real life and has been divorced three times. Nicholson is hysterically funny here, but still manages to pull of the dramatic scenes with ease. There are only two problems with this movie from a content perspective. The first is bad language. I guess you can't get two old guys together without a lot foul language being spat out. Expect to hear the f-word once and many other profanities and vulgarities as well. Not constant, but still more than I'm comfortable with. The second issue is not as a big a deal if you talk it through with your kids. At one point, Freeman is approached by a woman (discretely) with an offer of sex. He is married, so he turns her down. Your youngest kids might not notice this scene, so I would go ahead and leave them in the dark, but you might want to use it as a teaching opportunity for your older kids.
SUMMARY: A very good movie dealing with death but more importantly with living a good life. Language is not appropriate. Be warned.