The film is warm, full of humanity, and is about these lovely middle aged women, and how much fun they have causing a scandal and ruffling feathers. You'll recognise most of them from BBC sitcoms, and films. (as an aside, if you've ever wondered what any of them look like naked, now's your chance.)
There's a few bum notes, mostly "drama" added to keep the pace going. One of the women has a philandering husband, and the experience gives her the confidence to confront him. I wish I could shake the feeling that It Never Really Happened, and the event was added to "make things more interesting" - because is really is #12 in the Big Book Of Standard Sub-plots.
Likewise the two main characters get all huffy at each other for hogging the limelight, and it doesn't really ring true. And that's #9 in the book.
Other than that, the film is a delight, the writing is great, there's some fun cameos, and I would recommend this film to anyone, including your parents.