Ok, I'm here.
I can comment on the PSS's. The P4S's, I've only got about 2,000 miles on them. I have the 285/35-19's on the front. They have a lot more grip then the PPS's I had on the front. At the Dragon. The PPS's would push some in the hairpins. I could get the P4S's to push a little, BUT that was driving at over 85% on the street. Not healthy. In the rain. It poured on the way home from the Dragon. As with any wide tires. You have to watch the deep water. With the rain. I really didn't have any problems will them. Asked the guys who followed home.
Mileage wise. It's to soon to say. Overall, I'm impressed.
I'm still waiting to do some trackdays with them. I'm waiting on my OS Giken diff to come in.