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

Let me give you an example: I've read this book with much expectation, it was very boring all through out the book
The answer to this example can be: Negative
Here is why: Review writer does not like the book because it was boring, therefore it is a negative review.

OK. solve this:
The samples sounded interesting, but a few spins revealed that there's really nothing of substance here. While I'll concede Connors sounds like a proficient guitarist, he's just not really playing anything here. The Airs pass by like a breeze, leaving nothing memorable behind. It is not substantial enough to be either good or bad.
Answer:
Negative