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 Decepticons play the Autobots like a used violin and demostrate Cybertron's AI still has a long way to go. While LaBeouf and Turturro act as if this movie is their character's last episode --- and they really over-act in this movie which is lacks the charm of the original TV cartoon.
Answer:
Negative