I'm still hooked on Brakemotive. Each time my brakes need to be replaced, I buy a complete set of slotted, drilled rotors + brakes from Brakemotive. I have the dealer chuck the whole set on the car and install my new set. The dealer usually charges about $200 to do all 4 wheels. The Brakemotive 'kit' is sold on Ebay for about $150 for all 4 wheels. I get 4 new dichromate rotors, new ceramic brakes /shims, etc. The finaL cost = less than $400 for completely new rotors and brakes on all 4 wheels. I am currently driving my 2nd M and between the two cars , I am on my 4th set. No warping, no squealing, no brake fade. They last the same as OEM but perform better and cost less.
https://www.ebay.com/itm/Front-Rear-Dri ... 1438473557. I know they make a set for the 37 / 56 models but not sure about the Q70.