As for the helmet I was surprised initially by the lightness, used to the Plantronics, I had the feeling of losing him as he very well yours :)
Microphone mute button and volume control on the cable of very good quality. Cable itself is high quality!
Small problem, the cable is over I do not know why, but it comes with a USB extension cable.
Personally I've had nine months, uses me for hours! RAS!