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

Example Input: Comfortable right out of the box. Well made. Durable. Can't vouch for the waterproofing of them, as I have learned many moons ago.....no shoes are waterproof. I refuse to test them, once you do...they never seem to be the same.
Example Output: Positive

Example Input: I wouldn't recommend this book to an enemy. True, the information may be worthy, but the writing style and the narration were horrible. It is definitely NOT written (nor read) in a conversational manner. I'm willing to cut the narrator some slack as he was only reading what was written, however better inflection, phrasing, pauses, etc... would have greatly helped this otherwise tedious book.I couldn't even finish it. I suffered through the first 5 disks and after all that investment in time I couldn't bring myself to listen to the 6th. Its just that poorly written.I'll restate the fact that the message -- the information -- is worth hearing, its simply written in such a tedious manner that I couldn't stand to hear it through the end.I think I'll donate it to my local library.
Example Output: Negative

Example Input: Maybe my expectations are too high but after reading the reviews I expected more. I thought the plot was too unrealistic for me to even be interested in. I liked the characters but I found myself flipping through pages just to get through the book.
Example Output:
Negative