It is a fashion and convenience tool. Poor sound quality. Comes with the general Bluetooth problems.
The funniest problem I had was on the subway and some bored kid next to me opened and closed the lid back and forth. For some reason this spammed my phone with connectivity messages to the point that I could not use my phone.
I think the sound quality is remarkably good given the size and form factor. It's not comparable to over the ear headphones of course, but that is a different use case.
