I just installed EBC Yellows on a stock rotor with Afco oversized calipers. I've finished the initial break in and need to complete the burn in process. I will say that I have what feels like twice the stopping power over a low budget set of stock pads but I'm yet to lean on them real hard - they're time is comin' lol.
The knock them is they don't last long and they will destroy a rotor much quicker than a standard semi-metallic or ceramic pad. That's not much of concern for me as I expect to do brake maintenance/repair annually (less than 5K miles).
Okay, I will give them a try. Need to stop 450 ponnies quick sometimes. Lol