I bought the meg's one from halfords after it being mentioned on this thread.

WELL impressed, clayed the bonnet of my daily driver as it had got splattered with angle grinder dust when I was modifying some calipers on another car to it was in a right state.
Its really impressive how much its taken it off, should have taken some before and after pics I guess really but forgot!

Proper bargain when getting 2 for the price of one I reckon