Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't expect a miracle

Bottomline is, they are below average in noise cancellation and somewhat at the average in sound quality. I took them on a plane once, they did nice job in cancelling the plane's low-frequency humming, but I still could hear my neighbors very clearly. The best usage I find for them is while working in my home office to suppress disctructing outside noises.There's also a concern about quality, the rubber strip that goes around the top of a head ripped off after only a year. After inspecting the way it was attached I figured out I would have given up anyway even if it treated them if they were golden.I guess the only attractive part in these headphones is the way they collapse. They look rather big unfolder, but can fit inside your jacked pocket folded.