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

Example input: I've read this book with much expectation, it was very boring all through out the book
Example output: Negative
Example explanation: Review writer does not like the book because it was boring, therefore it is a negative review.
Q: I have a $20,000 stereo with DTS, SACD 3100 watts. This is far and away one of the best content, musicians, songs etc... that I own. The sound quality is a 4 out of 5 but the songs and musicians more than make up for it. A definite must for any audiophile.
A:
Positive