Been a while but I will update here also. While I liked the R4s pads I had them in for about a week with great feel and normal dust and no noise. The next weekend we went to a HPDE at Road America on Sat. Then AutoX on the Kart track there on Sunday. Sat. was a total of 3 twenty minute sessions on the full 4+ mile track with the last session being closer to 30 minutes. And Sunday's event was 7 runs on the AutoX course. The car was trailered there and back so no hiway wear was incurred. When I swapped out the track wheels on Monday I found the rear brake pads down to less than 1/16th inch pad left on the drivers side and 1/8th inch passengers side left. Mind you only one weeks minimal driving on these great street pads. Now RA is a big track with a reputation of eating brakes on cars. I was stunned that the rears were gone and the fronts looked like new almost. Only thing we think it could be was Torque Vectoring as I had ESC in Full Off every run.. Other than that the pads and the car are great fun.