Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: they stopped working after six weeks... buuut

Loved 'em, blew my Sony's away in both sound quality and comfort. Maybe the cord was a hair too short, but that's better than being waaay too long.However, this Thursday the right ear just stopped working for no reason... I cleaned 'em off and inspected them for cuts - they're in perfect shape! My other Sennheiser headphones have worked great for years, but these are my first plug-style ones and I'm really annoyed. Especially since I got mine for $39.95 in February from Amazon (via 8th Street music) and now they are almost $70!If they repair/replace them I'll be fair and let you people know, but until then beware!UPDATE: Sennheiser repaired these for me quickly and for free! Great service, and my wife has been using them without incident ever since. I'd up the # of stars to 4 (since they're not nearly as good as the Shures I replaced them with), but I don't seem to be able to.