Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sounds good, but....

Well, after owning these headsets for about 3 months, I can honestly say they sound great. They are comfortable and fit my head well, plus the active noise cancellation is somewhat effective. Ok, now the bad news. After carrying them around in my backpack, I noticed the earpads come loose very easily. A simple reattachment procedure solves this annoyance. In addition, the headset is not very durable. The twisting-folding mechanism works, but the headband breaks easily if you use it a lot. I would suggest a non-folding type, they are more durable. I filed these under a lesson learned and suggest that you treat this headset with "kid gloves" or you will end up with a broken headset. I am going to try in-warranty repair, but I am dubious of the outcome. Good luck.