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: I do believe this product is very good but, in my case, the cincher smooths my waistline more than anything. I am already petite, so the cincher doesn't significantly reduce my waistline. It does, however, make my waist look A LOT smoother and hour-glass like. You cannot really wear it under thin clothing, as others have pointed out, and, for me, it is impossible to wear it during hot summer days - the sweating and the rubber can create a rash situation - but I still recommend the product. It is a very good and very cool cincher. I think it can even be worn on top of clothing, for a goth or fetish look. It is well-made and makes clothes look better on you.
Solution:
Positive