I bought the Cowin E7 Pro headphones to cancel out some of the general noise in my office so I could focus on my work better. The headphones are comfortable and stylish. The materials and construction seem to be of good quality. Bluetooth connectivity was easy with my phone and laptop so no concerns there. The headphones are quiet as they are without the noise cancelling feature enabled., kind of reminds me of the hearing testing booths at school when I was a kid. The earmuff pads are comfortable and form fitting and help to isolate from the outside environment. With the noise canceling feature enabled, the sound stage is very quiet and the sound quality is pretty good. They are not very loud though, so if you are looking to thrash, they are not really made for that. Podcasts are easy to listen to, Music is crisp and filling. These are not $350 premier noise cancelling headphones however, they are pretty good straight out of the box ad I hope they last for a while.