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

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would definitely recommend this book to someone traveling to Cambodia over the Lonely Planet edition, which is *really* outdated.
Positive

THE BEST SAUCE YOU COULD EVER PUT ON YOUR TABLE AND USE ON YOUR COOKING ON JUST ABOUT ANYTHING, BRINGS THE COSTARICAN SPIRIT ON YOUR MEALS!
Positive

Wish I had read the reviews first. I had no idea how bad the sound quality was before I bought this.

Negative