The only notable problem is that their wing does not fit well on the back of the ear, resulting in instability while walking (cheap flexible material). The problem is partially solved by tightening the cord with the blue clamp that is integrated into the cord. Otherwise, I did not encounter any particular issue with the sound or the connection.
Mixed feelings.
I made this specific purchase in order to redeem the points from my smart cart before they expire in 3 years. It was one of the few products that was not overpriced.