Once again, I purchased Michelin Pilot Sport Ribs (Porsche N-rated and approved) 225/40/18 and 295/30/18.
I noticed the improvement right away over the Pirelli PZeros that came on the car originally.
I can only comment on straight line performance until they get broken in more. Also note this review is geared toward the STREET USE LEVEL not track use!
1) They are quiet compared to the PZeros. Very slight hum, but not annoying considering the rear tire widths. I'm much happier in this regard as this was my major complaint before.
2) Much more comfortable over rough roads.
3) Fronts weigh 24lbs
4) Rears weigh 27lbs
5) Felt stable and balanced at speeds of 100-110mph
6) Road manners have improved. Less tramlining and feeling like riding on rocks.

I'll report back the handling/ grip / and steering response as I drive it more.