From my experience are bad... Much worse that organic/OEM replacment pads with some grooved/drilled discs just to keep the braking surface of the pad clean.
This combo i have now ( MTEC brakes grooved and drilled discs and ATE organic pads ) are a beauty to have with severe driving conditions.
Just to give you an example: from 210km/h to 0 without any kind of problems or overheating.
Check for my setup in the 7 gen Modifying section. Hope it helps