Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good Concept, Poor Quality

The noise reduction feature is great on airplanes, but I've grown to dislike these headphones. After 3 months, I'm getting static in the left earpiece and the battery holder makes static in both phones when you move it (loose connections?). Nobody services these in Detroit. Also the battery holder is always getting tangled in the cords which is annoying. I'd recommend Noise-Cancelling headphones, just not these. I'm looking at the Sony NC6's as my next pair.