This is a delight, a very funny and clever take on an obsession with a particular book. It works so well because for many readers a book lives on in their imagination, they dream of what it would be like to be, say, Elizabeth Bennet. The difference here is that Amanda Price, living in 21st century London, finds herself transported back to the beginning of Pride and Prejudice. But she goes as herself not as Elizabeth. The humour comes from the fact that she is so different from the other characters but mainly because the story is coming out not as in the book. Everything she tries to do to get the story back on track with the "right" people marrying each other only seems to make things worse.
If you know the book at all, it's interesting and funny to see how things are turned on their head. I don't consider myself to be a book purist, although I do know the book fairly well but even if you are, so long as you know that this is most definitely not an adaptation of Pride and Prejudice, I think you will enjoy the fun.
There are some delightful laugh out loud moments and some knowing jokes which are even funnier if you know the book and the Colin Firth/Jennifer Ehle version. The recreation of the wet shirt scene is both funny and touching and there are so many others. (Incidentally, I think that scene is an anachronism in the earlier version so even that adaptation is not perfection in my view)
I found the first episode rather irritating because Amanda was doing nothing to make herself less like a fish out of water but I stayed with it and I am so glad I did and I think I won't find that episode so odd on second viewing.
It is well cast and this version of Darcy shows someone with a heart. This is the first time I have had any sympathy with Mrs Bennet - I felt rather more than I have ever done before the very real imperative for her to get her daughters married. I have just laughed at her before, as I was probably meant to, but this portrayal made me feel for her and for her daughters who were as desperate for husbands as she was, in one instance appallingly desperate.
This approach took a different look at the characters and played with the idea of making them or their stories different and shedding a bit more light on how things were, or how we think they were, without being too serious about it.