I have those same one on the front of my ST. I paired them with some Akebono ceramic brake pads. Little to no dust and great stopping power. They seem to have hardly worn at all over the past 50k miles. They are rather noisy though. Makes a "helicopter" sound when the brakes are applied. My wife's car has cross drilled/slotted rotors and they are quiet. I think it is because of the dimples that these are noiser than most...