That is pretty cheap for 4 rotors. I'd be concerned about longevity and notice they only offer a 90 day warranty which means they probably don't make their own and simply import someone elses. Good quality rotors don't have to cost that much - I just spent $500 for my all 4 drilled and slotted rotors made here in the US. Unless your rotors are worn out or you rally/race, do the stainless lines first and you'll be plenty happy and out less than $200.