just used the Pagid RS19 yellow at Laguna Seca today...wow what a difference to stock pads...all I can say is bite bite bite...somebody said boat anchors...I can second that. They are noisy like hell on regular streets, but I am willing to live with it. It also seems that they wear 10 times better than the street pads and they also don't overheat.
The close to $800 was definitely worth it, at least if you are serious about tracking your car