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

[EX Q]: This book is not for everyone. It is extremely scary and disturbing. At the same time, it is a fascinating look at the police work and prosecution that brought the murderous Manson Family to justice. The book is hard to put down; the in depth discussion on presenting a criminal case in court and developing evidence to support the case is outstanding. The main complaint is that the book is a few hundred pages too long. The author seems a little too self-promoting, but then again he did get a prosecution on one of the biggest murders in history.
[EX A]: Positive

[EX Q]: Umbra Coretto 24 to 36-Inch Decorative Tension Rod, BlackThe rod is really good looking. However, because it is so thin, the weight of my shower curtain keeps causing the rod to come loose. If I had any idea, I probably would not have bought the rod. However, my shower is at the wider end....so maybe a person would have better luck if their shower is closer to 24".
[EX A]: Negative

[EX 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.
[EX A]:
Positive