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

Q: If I could give this half of a star I would. I am a big fan of Nirvana, but this was a total disappointment to me. The tracks sounded awful. I felt like I was ripped off in every sense of the way. I took it to a buy-trade-sell place and not even they would offer me anything for it, which shows you the poor quality of this album. A word of advice; DO NOT BUY THIS!!!!!

A: Negative
****
Q: Although this is a wonderful working power adapter, I don't believe it is the Macally Adapter that was advertised. I am however happy with it and would shop with this vendor again.Thank you.

A: Positive
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Q: Well iu thin that this book should've had a first book. Its very confusing and boring its so long I did not like it !!!!!!!!!!!

A:
Negative
****