I read the novel, which is a collection of letters between the characters, when it first came out. I really enjoyed the film! It has the same feel as the book, which makes sense as the author is also the writer and director. If you haven't read the book, I can see where you may feel it is a bit jumpy.
The acting is great, Hollander is my favorite actor and I always enjoy James Caan as well. They work well together and I really enjoyed their scenes. The supporting cast is also charismatic.
The story is, again, enhanced by having read the book I think. We're looking into the lives of these characters, and the events take a realistic approach in not giving a big resolution. I feel this enforces the principle that time goes on, and nothing is ever wrapped up in a big tidy bow forever.
Overall it is a sweet film about friendship, family, love, growing old, and death. I think it teaches a few timely lessons. It's an easy way to pass a couple of hours.