Instruct: Classify Amazon reviews into positive or negative sentiment
Query: spinalfusion

I know some people don't like these earphone, and they are expensive. But, I've been pretty pleased with them. They have excellent sound quality and they stay in your ears fine if you're not moving around too much. If you're big on exercising with your earphones, you might have some trouble but not any more than with the standard iPod earphones. Actually, I think they fit better than the standard iPod earphones.