Instruct: Classify an Amazon review as either positive or negative.
Query: Great while they lasted,

I purchased a pair of these headphones because I found the pair bundled with the iPod to become very uncomfortable after a while. Initially they were great: extremely comfortable, great sound, and no tangled mess. About two months after my purchase the right earbud suddenly produced no sound. Thinking that I perhaps inadvertently damaged the cord, and because I was very annoyed with the lack of sound balance, I decided to purchase a new pair with a gift card. Yet the same problem has again occured, this time only after a few weeks of use. I am a big user of various electronics and know for certain that I was not misusing this product, so I am convinced this was niether my error, nor simply bad luck. They were great while they lasted, so hopefully I can convince Apple to exchange my bad set for a new one. Buyers Beware!