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

[EX Q]: Works fine on the PowerBook G4. Doesn't have an LED to tell you it's on and, of course, doesn't have a smart plug to show charging status.
[EX A]: Positive

[EX Q]: I just returned from a month-long trip to Vietnam and Cambodia, and I found this book extremely useful for Cambodia. Not so much for hotel listings, etc., but for no-nonsense background information on Angkor, Phnomh Penh, and Siem Reap. The Vietnam portion was helpful as well, but I relied more on the Lonely Planet and Rough Guide Vietnam editions for that country. I would definitely recommend this book to someone traveling to Cambodia over the Lonely Planet edition, which is *really* outdated.
[EX A]: Positive

[EX Q]: Like the ones before, this book is a solid forensic and police procedural. A death row inmate is executed and his fingerprint later shows up in a current crime scene. How could that have happened? I particularly enjoyed seeing Kay's niece, Lucy, again, as she is 17 now and her own person, no longer a child. Lucy's computer skills continue to amaze. I look forward to reading the next in the series!(Note: There is a continuing bad guy introduced in this book who appears in the next two installments as well. I'd recommend reading this book before The Body Farm and From Potter's Field)
[EX A]:
Positive