This is the kind of movie that I like. The plot is well-written and well-directed. I like Edward Burns as an actor and writer. Even so, there are some pretty significant flaws in this execution of this wonderful idea.
The most substantial problem problem with the movie is the casting of Maxine Bahns. She is a very poor actress. Since she was cast in the earlier "The Brothers McMullen", also written and directed by Edward Burns, I assume there is a friendship that misdirected that decision.
Some of the characters don't play out quite right. The role of the brother, played my Mike McGlone, is well acted, but the writing made that character a little too two dimensional. I think there was a opportunity to create a character with a little more complexity than the wealthy, uncaring, superficial husband.
There were some good performances by actors on their way to being A-list players. Cameron Diaz turns in an exceptional performance. Jennifer Aniston also shows her acting chops. Amanda Peet also turns in a short, but well-executed performance.
In spite of some of the casting flaws and missed opportunities for some depth in characterizations, this is a very enjoyable movie. If you like character and plot-driven movies, this is a worthwhile way to spend some time.