Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
One example is below.
Q: I've read this book with much expectation, it was very boring all through out the book
A: Negative
Rationale: Review writer does not like the book because it was boring, therefore it is a negative review.
Q: We purchased 2 of these for guests' use and they are quite comfortable. The pumps work relatively quickly and quietly, and allow for good firmness in the mattress. They also held air well and needed little additions over 2 weeks' time.Our only drawback was that the air doesn't provide insulation from cooler ambient air. We keep our home cooler at night, and a guest found it necessary to cover the mattress with a heavy blanket to insulate properly from the coolness. I would recommend a mattress pad or foam topper when using this to provide some extra warmth.
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Positive