like i said. they disapate heat. therefore better stoping. the glazing of a break rotor is from intense heat. by not having a constant friction under brakin the heat isnt accumulated so quickly. so therefore less likely to become glazed and less likely to becom useless rotors. cross drilled and slotted rotors serve a purpose. so for daily use you may not need them. i know some simple tricks to mod a stock rotor to bite harder. but for my intentions. i like to have my brakes nice and ready for high heat.