For Sound: In a word * superior * (hence five stars). I had much more expensive headphones from Sennheiser as (nevertheless good headphones!) Who sounded worse. The complain about the bass I can not quite understand: It deafened yet, but admittedly somewhat undefined. Because of the sound, I would buy the headphones again, despite the disadvantages.
Addendum: You can still see what's left and right. It is on the inside of the bracket at the transition to the middle piece. For whatever reason.
And: It expresses quite badly and I do not have a thick head - at least not a pretend in the headphones hurt!