Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
One example: I've read this book with much expectation, it was very boring all through out the book
Solution is here: Negative
Explanation: Review writer does not like the book because it was boring, therefore it is a negative review.

Now, solve this: As a Noni user for many years, when my preferred vendor had some delivery delays ordered this brand of Noni. When it arrived was disappointed to see not PURE Noni juice, but rather adulterated Noni with fruit juice. I use NONI not for the taste, but the health benefits, yes NONI tastes bad, but I want the benefit of the NONI not additives to make it taste better. Can't recommend this product.
Solution:
Negative