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:
There is no one experience that could somehow describe them all. I didn't find the book very interesting, nor would I recommend it as reading for those who are going to go on the JET Programme sometime in the future. In fact, I recommend you read very little of the 'foreigner does Japan' genre and stick with facts, figures and Japanese language. And basics of English language teaching. Believe me, you will enjoy your 1-3 years in isolation and miscommunication without your head full of pop-anthropological nonsense and you will come to know your full self.
Answer:
Negative