initially. We had to turn the rotors slightly to solve the issue. I measured runout on the hats themselves and they were dead on but the rotor sections had slight runout on atleast 1 front set. I also understand the brake bias issue. Fronts do lock up sooner. We ended up using a brake bias unit from spl and were running heavy rear bias. Pad selection is super important with this setup atleast on the track. We used different compound front to rear pads. Once we had everything sorted, the car had no issues whatsoever even with slicks all around and hard braking from 140 mph to about 60 mph.
It is hard to compare this setup to the stoptechs due to the price since the full stoptech setup is almost 2 x this kit and replacement parts like rotors and pads are also very pricey. If we had a lot of cash we would have gone Stoptec...