With no frost around (but still only 3C ambient temp) and lots of opportunity to put my foot down, I gave the new PSS a workout.....Wow! The car feels like it is velcro'd to the road. Car was a little thirstier than recently, but considering how much I put my foot down today, a devilish 31mpg vs a saintly 33mpg, i'll take the dark side!
The difference is like night and day in grip and your confidence in the car's abilities.