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: Great Door knocker. It has a very clean look to it and the peep hole isn't obvious. It's a little on the thin side but I guess you don't need much. It was easy to get engraved. It wasn't the easiest to install. Would have liked a template to assist with lining up the screws. Other than that, it looks very professional.
A:
Positive