The only problem I've had had nothing to do with the pads themselves. My clutch pins seem to stick out a little further than most and dragged on the material. I just cut the center opening over the clutch out a bit and no problem no more.
Plus, I can tell you they do a real good job of dampening the motor
I swear the battery box is now the loudest component with vibrating but I think I got that dampend out, too.