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

Example Input: This book was interesting with great promise. The premise was fascinating but the writer fought with herself throughout. She spent a great deal of time on the flora and the fauna. There was always a paragraph on a bush when a sentence would do, a sentence on a tree when a word would suffice. The characters were well developed. Over all it was a good read.
Example Output: Negative

Example Input: Felt great until it dug into my waist while sitting causing damage to my surgical site. Now I'm in pain with and without it on.
Example Output: Negative

Example Input: This book is great. It is very informative. It is easy to read and understand and has alot of pictures. i would recommend this book for any one wanting to learn about Chinese Medicine.
Example Output:
Positive