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


question:
I just plugged it in and it's on the job. Perhaps it would be more assuring if it had a digital read-out of level of monooxide in the air.
answer:
Positive


question:
It is too bad that this is practically the only one of the kind. The aim is great, the contents are great, but the author does not know how to write a technical book. The author refers to concepts and terms that are yet to be defined or never defined at all. For example, at the very beginning, the author talks about "violet" and "purple". Am I the only one who did not know "violet" means a color of a single frequency, whereas "purple" is a color of combined frequencies? This is a No-No for mathematicians and scientists. For those of who are already familiar with Color Theory, the book must be a great assurance, articulation or enhancement of their existing knowledge, but for those who are new and try to learn as an artist, this is a nightmare. I am the latter kind. The only reason I could finish it was because I am familiar with fundamental physics and optics already.
answer:

Negative