I bought this for my daughter as an aid to revise for her GCSE English Literature. My daughter found this to be a very useful resource, filling in the gaps in her knowledge of the book. When I asked her whether she would recommend it to other children doing their GCSE's, her reply made me laugh - she said "I learned more about Pride and Prejudice from reading this book than I did at school."
When I asked her why she felt that way. She said that the detail and the analysis while comprehensive was easy to understand and digest. She was able to study it at her own pace which made a big difference especially when compared to the hustle and bustle of a class room where she felt that some concepts and ideas didn't get fully explored.
I think that sums it all up really. If your child is doing GCSE's or even A levels and this book is on the course, then York Notes will be a useful revision tool.