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've read several other Deborah Smith books. In my opinion Blue Willow was the best. Sweet Hush was by far the corniest book, I've read in a long time. The phrase "Sweet Hush" must have been at used at least 100 times in the book. The main character "Hush" was predictable and one dimentional. If you enjoy Deborah Smith books, I would skip this one.
Example Output: Negative

Example Input: Just what I needed to get me headed back toward my pre-pregnancy waist. Bought an XL and probably could have fit into the large. Looking to down size soon!
Example Output:
Positive