My wife and I (in our 50s) went to see this with my parents (75 and 80). Mom was sorry to see it end. Yes, this is a movie that will appeal to an older crowd, especially if you have children or are divorced, and it's unfortunate that the younger sect will likely ignore it. It presents a very accurate perspective on parenting, especially as a divorced couple, and relationships at an older age. The dialog and portrayals of events/situations was very realistic and interesting enough to hold my attention.
It would benefit each generation to see movies that realistically address a different generation, to give us all a better perspective of life in general. I personally think I'd have enjoyed this movie even in my 20s, but in my 50s, I loved it. So did those in attendance with me. Makes you a little sad to know James G. won't be around to do more work of this quality.