Instruct: Classify Amazon reviews into positive or negative sentiment
Query: big disappointment

These earbuds strike me as borderline defective in that when you tap or jostle the cord while using the buds these sounds are magnified tenfold compared to my simple Sony earbuds or the standard earphones that come with the iPod. I'd describe the Sennheiser version as noise-promoting, not noise-blocking. If you have to sit as still as a statue to enjoy the sound quality offered by this headset, it's virtually worthless.