I've tried both the K7 and the ZC08 headphones. The K7 fits my larger head better than the ZC08, so I went with the K7. Unfortunately, the K7 control buttons are markedly inferior to the ZC08 buttons. The K7 would be perfect if it had the ZC08 type of buttons. Why they each have a different configuration is baffling. K7 2.0 should have the ZC08 buttons. Then the K7 would rate 5 stars.