Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.

[Q]: I really like Christine Feehan. This book was very dissapointing. The plot had promise. Nicoletta was a sweet heroine. The prose were good, and the medival Italy setting was an interesting change of pace. However, the plot flows like molasses in January. I managed to get half way through before I through the book down and went back to the 'Dark' series.
[A]: Negative


[Q]: After reading all the great reviews on this product on Amazon, I decided to go for this. I don't typically have good results from diet products, but I figured I'd give it a shot. I've been taking these for 3 weeks, as directed, and I might as well have been taking sugar pills for all the more this is doing for me. I felt like my appetite increased, I haven't lost any weight at all - in fact I've been fluctuating up and down 3 pounds for the past couple of weeks. I gave this two stars because I didn't feel the anxiety or sleeplessness that some people complained about, but I'm still disappointed. I was hoping I'd find something that actually worked!
[A]: Negative


[Q]: Bought this product for a friend's visit back in late October. Since then (It is now early February), it has been slept on for a total of seven nights by two different normal sized adult guests, and promptly deflated when a third guest tried to sleep on it this past week. To its credit, the product did last just fine through those seven nights. It did, however, break not too long after the 90 day warranty ended and we have no reason to believe we will be able to repair it or otherwise recoup our loss. Purchase with the understanding that this is basically a disposable air bed with a warranty that seems conveniently short.
[A]:
Negative