Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Horrible sound quality

Like many other users, I purchased these headphones to replace the standard headphones I received with my iPod. The sound is very tinny and of extremely bad quality. I'm not sure if the varied reports on this product are due to the different devices the headphone users plug them into (i.e. with iPods they sound worse?), but the quality is pretty bad. Even the pieces that fit into your ear are uncomfortable and actually begin to hurt after half an hour. Obviously they don't cost a lot, but I had another pair of Sony headphones for less money that sounded great and lasted me 3 years. Overall very disappointed.