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

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
My ex bought these for me for $70 to get me into hiking here in the Cascades around Seattle (I have always hiked wearing regular shoes, but on flatter terrain in Northern California). I have always worn them with hiking socks and liners and they have been phenomenal. I think the longest hike I've done is 8 or 9 miles in a day, but I've done quite a bit of vertical including Mailbox and Snoqualmie Mountain and these have never let me down. After two years I can still slosh through creeks and melting snow and I've never gotten wet feet. The boots have held up well and look as though they'll last another year or two of hiking and snowshoeing.
Answer:
Positive