TBH with you they are no better than the standard pads that you have on the car already. If you wanted a better pad you are better off looking at eaither the Greenstuff/Redstuff, or go down the route of looking at Mintex Extreme, Ferodo those sort of options.
I have used what EBC call blackstuff pads before and i didnt notice any difference at all. I changed over to a Tarrox fast road pad, and the difference was incredable, as soon as you touched the brake the car pretty much stopped