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

Example Input: 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.
Example Output: Negative

Example Input: Worked like a charm all over England. I haven't tried the other adaptors, but I found my MacBook to work just like it does here in the US, and there was no difficulty plugging into the outlets.
Example Output: Positive

Example Input: Look carefully at the pictures for this product. The initial picture, without the brand name and with a blue LED light, is the product that works on iBook G4. The customer photos show a completely different product, one that is not recommended for use on iBook G4. I did not receive the product in the initial picture, but thankfully I noticed this before I opened the package (the package says iBook G3) and I called the support line. They said I had not received the right product and could not guarantee that the product would work correctly --or at all, so I ordered a replacement through Amazon. Still, I did not get the right product. Amazon told me they would stop selling this product as there is a problem with what is being shipped. I got my money back and went to our local Mac 2nd party store to find something reliable for the G4.
Example Output:
Negative