Books are usually better than movies from books, one may say it's a universal truth. And Fruttero&Lucentini's novel is better indeed in this case, read it for proof. But - surprise, surprise! - no bad movie at all: a bunch of excellent actors and actresses, all at ease in their roles (especially Mrs. Lina Volonghi, a great actress whose kind Italy should regret) and the feeling they are all having fun while acting (see the hilarious scene with Mastroianni among a group of prostitutes in the police station). Just good for one of those boring Sunday afternoons in winter.
Review of The Sunday Woman
