Quality is great! I was working on a project for about 4 hours and almost forgot I had them on. I did a bunch of research before getting this and it exceeds my expectation. again, recommend putting a pair of nice pads on these, and you wil be blown away! I can place iPad there while exercising. I like that it is thin because it will be lightweight and compact when traveling. - Other than normal cellular lack-of-quality calls (with or without this adapter, as with any radio signaling requirements or interference), we are able to have perfect joint conversation on the same connected device without issue. I feel sorry for them as they missed out. I know some people love the lights so there is really no much complain here, but 50 hours is kind of false advertisement or not so clear. I paid more than $60 for about 20% of one ink cartridge.