No, no warranty, I will go OEM just to be on the safe side.
Chances are that the previous two owners never changed the rotors so the originals are still there, I really believe that when you take it to the dealer on the free maintenance program , the techs don't change out all the parts, like rotors, I truly believe they take the short cuts and only change the pads.
I'm gonna change everything oem and start fresh.