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:
almost a year of use, and it still works great, this runs from our tv, to my treadmill, I exercise 6 days a week, and this is a fantastic extension.
Answer:
Positive