I have the same TK pads on slotted rotors. I did a break in of half a dozen runs up to 60 and VERY firm braking back to about 10mph. I also put the Goodridge SS line and super blue fluid in at the same time. Then on my way home some moron pulled out right in front of me on the overpass. The brakes worked REALLY good! That was last fall, I am still happy with the breaking performance.