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

[Q]: Adapter worked flawlessly for six months, then became intermittent. Seems to be broken or shorted somewhere near the connector to the computer. Even the ridiculously flimsy cord from Apple lasted longer than six months, so I can't say I'm pleased. Macally says they'll sell the connector cable separately for $17.00 which is not much of a bargain.
[A]: Negative


[Q]: I've noticed very little degrading of the sound, if at all, and this is rare in most extensions. The cord is thicker than usual for both the positive and negative polarities - a separate wire for each - and I'm quite pleased with this, will perhaps get another because of its thickness. I now have great headphone sound within a twenty-foot range - just what I was looking for. Even if you don't need 15-feet of cord, I would recommend this over the shorter 10 foot cords where the wiring is about half as thick and not likely to hold up over time...I subject all my electronics to heavy use. Plus, the best extensions for Grado headphones go for $40, and I'm quite satisfied saving over $30 by having this one.
[A]: Positive


[Q]: Because of its extensive bibliography and excellent index, this biography of William Procter, Jr., serves well as an introduction to the origins of professional pharmacy in the USA.For more information about the book and its topic, contact the American Institute of the History of Pharmacy (AIHP).
[A]:
Positive