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

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.
Positive

this product is awesome. it hide all your secrets. I would recommend this product to all women and men. I will buy product again.
Positive

I bought this book wanting to learn how to make a journal. This book did not show the basics. It was a waste of money, the author seemed more interested in presenting cute ideas and making pretty pictures than teaching basics.

Negative