Just put 2 on the front wheels last week and one word - excellent!!
I've had my Edition 30 for well over 4 years and run it on two sets of Goodyear F1's and a set of Dunlop Sport Maxx prior to that covering 50,000 miles and the difference is night and day.
The F1's I had on still had 4mm of tread but they were absolute garbage compared to the first set, I don't know if they had changed the compound but the last set just didn't inspire confidence so I had the PS4's fitted last thursday.
I've had a wet weekend holiday in Wales over Easter and the PS4's have been flawless, the ride is better, handling is better, traction is night and day different. The F1's were spinning up in 3th gear in the wet easily (stage 2 Eddy) but the Michelin's just grip. I know I'm comparing half worn tyre's with brand new one's but this last set of Goodyears were.....
right from day 1.
Get some PS4's, you won't regret it, I guarantee.