i did not notice a huge difference in braking performance. i had the front rotors cut and bled every line. there is still noticable brake fade when u really get on the pedal. as for wearig down and all that i wouldnt know, havent had them on long enough. if your worried about ruining your rotors then i say just stick with the regular pads. i wouldnt recommend the kevlar pads unless you were doin racing every weekend.