Well, I had heard mixed reviews about this film. It is based on a novel by Zoe Heller called WHAT WAS SHE THINKING? I read it a few years ago. I really liked the premise but the book left me cold. The characters felt a little two-dimensional. Well, this is one of the few times you will hear me say that the movie is better than the book.
First of all, you can't go wrong with a Judi Dench movie. I love her. She has had such a wide variety of roles. But she really reinvents herself with this one. The movie could have easily devolved into a black and white portrayal of the characters. But Dench and Cate Blanchett manage to give the women depth. While finding their behavior reprehensible, you can still have sympathy for them. The movie felt a little long. Perhaps a bit more editing could have helped. But I think the story was well-told and the acting superb.
(movie reviews can be tough because I feel very strongly against giving anything away...sorry if this one is especially vague)