Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
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Question: I've owned this CD for a few years, yet thought something was slightly off, so I compared "Keep A Knockin" to another copy I have.Results:Original is 168 beats per minutes, while this version is 172 beats per minute.Original's time is 2 min. 23 seconds; this version is 2:16 min.

Answer: Negative


Question: My wife is very happy with this set of dishes that we recently purchased through Amazon.com. They are everything she had hoped and expected them to be. My happiness is more related to the purchasing experience. One dish arrived broken and I was very pleased with the efficient, fast and convenient way you handled the replacement. Thanks for a good buying experience.Bob Cordes

Answer: Positive


Question: It did not even occur to me that a plug-in CO detector would not have battery back-up, which is my fault for missing that. However, what the?? I mean, they ALL should have batter back-up. This one has to go back.

Answer:
Negative