These are great and I know have 4 of them!
The quality is good but after a while I have damaged the output in one side, maybe the cable was pulled or something.
The quality is maybe something to improve, but I cant really tell why mine broke.
But I would still buy these and I love them!
Can be uncomfortable to have em on your head for very long, but I often dont anyway, and the sound is better then my more expensive headphones which is great! =)