I have the Conti 5's on the A45 (tend to be regular fit on new cars) but owners who have changed to MPSS have also reported their superiority and they will be my choice later this year, having found when I had the 370 that they were in a different league, both dry and wet, to the Bridgestones & Sesstantas previously used.
Having said that the A45 grip with the Contis is plain awesome with the 4WD so I will be growing a bigger pair to find the car's limits shod with MPSS.