Bought in December 2013. These are the sports edition so are not like the big thick ones. Really comfortable.
No scuffs or marks. Working perfectly. Never had them on 100% as they got Hot!!! Even through 2 pairs of gloves.
They fit direct to the battery and then turn themselves off when the voltage drops. A life saver sometimes.
£40 posted or £35 picked up from NW7 London.