Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Excellent Value, Great Quality

Been using them for 12 hours in a row now (very comfortable). By far the most crisp and clear sounding headphones I've heard for under $50. Last pair of headphones I bought were green and black from walmart and I thought for $50 I would get something decent. Couldn't stand them and after 3 months I decided I needed something new. Had my eye on the M50s but I don't have that much cash, and after I heard these I wouldn't have bought them anyway. Tested out the monsters, beats and bose head phones through friends and family. I think the others charge you mostly for advertising, these sound the same as those (biggest difference for me seemed to be the source, a lot of difference between a crappy computer and a nice audio card).They also work fine in noisy environments, but they aren't noise canceling. Just simple and great quality.