Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

Although good quality product, it doesn't fit my ear at all. None of the sizes fit comfortably or snug. I can't use it at all and just wasted my money.
Negative

This book in the beginning was so slow that I finished a book twice it's length before I finished the first chapter of Tess of the D'Urdubervilles.
Negative

This is the wonderfully engaging tale of how Bugliosi successfully prosecuted the Manson Family for the August 1969 murders. However, if you wish to learn a lot about the backgrounds of the "family" members, this is not the book for you. This book is from a law-enforcement point of view. If you pick up this book hoping to learn about Manson and his philosophy, you'll be disappointed. However, if you want to know how the players were implicated and prosecuted, there's no better book.

Positive