I'm with Chris on this one. My ex-997S had PCCB and I had a few scary moment in rains and after car washes. It didn't happen often, but it gave me an insecure feeling when driving in the wet.

My club coupe now has steel brakes. It doesn't have the initial strong bite of PCCB, but its brake power is still better than most cars out there. Only at the end of a track day it fades a little. The only advantage I see with PCCB is the reduced unsprung weights at track use.