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: Here's a tip - don't shake it up and down. Turn the unit upside down so that the back of the unit is facing the ceiling and shake it side to side. My older son (7) uses that method and he can get it to recover quickly and find viruses as easy as pie. I actually took this sucker apart - the motion detection unit is actually a small metal marble that rolls over a circuit board contact - be careful taking it apart tho - its would be easy to lose the marble and then it would never work.The battery has also lasted for us 2 weeks under fairly strong use - he's up to level 16. My yonger son (5) also has one and while he's not as enthralled - no problems.
A:
Positive