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:
Received as a gift from my wishlist, I added it because of all the positive reviews and because it was waterproof (also the clear design looked cool), but quite honestly this is weaker than my cheapy $8 vibrator from a local shop. I have not tried it in water so I can't comment on that. It is also too stiff (rather than being too big), but mostly my issue is the very weak vibration, especially lacking in the area that should be stimulated most. The rotation also did nothing for me. With a name like Jackrabbit, I was expecting a lot more oomph. Don't bother with this product if your preference is not gentle... I found it annoying.
Answer:
Negative