From a strictly performance based review, tyres have been exemplary.
A almost perfect combination of grip in the dry and wet, ride comfort and low noise.
Tyre wear has been, OK. Front tyres have reached the end of their life however the rears are still on around 5mm tread.
Bigger concern is the visible perishing and cracking around the shoulder of all 4 tyres. This is visible on the edge and between the outside tread blocks.
In heavy rain, the tyres seemed a little susceptible to straight line aquaplaning. However in 'normal' wet conditions the grip is good and braking confidence inspiring.
Would I buy these again? The perishing / cracking around the outsides has put me off. My wife's car has Michelin Primacy 4 tyres and they too have perished quite noticeably.
The PS4S on my car are about to be replaced with Goodyear Eagle F1 Asymmetric 6's.

Just replaced Pirelli P zeroes, front and rear on Boxster 718 GTS, with Michelin PS4S . What a difference, it has transformed the ride without affecting the handling. Couldn’t be happier !!!

Very good but a big problem... Many good things about the PS4S... but the handling is too smooth.Less precision in the beginning of curve. The tire performing very well in high speed but for 99,% of people we need fun under 120km/h...

FINALLY! I just fitted a new set of 225/40 R18 Michelin PS4S to my GTI Performance and I had them on the car for roughly 450 km currently. Remember I placed this order on March 30 in 2022. Yeah, 2022! After some endless wait until October 8th delivered to dealer, and I use to fit winters in October, no summer tyres. On a sidenote: DOT 2222, so these American produced tyres were made two months after my order . . . . Somewhat facetiously, isn't it?
These PS4S replaced my former PSS in HN spec (Hyundai i30N). So, what do they look? Much wider, with a way better rim protection compared to the PSS HN. The sidewalls are almost straight on VW 7.5" wheels. Very pleased to lay my eyes on. My former PSS HN looked like a 205. How do they feel? Stiff. I didn't exactly expect them to be harsher compared to the PSS, but they really are. With ~3.5 mm my former PSS felt more forgiving if not just softer. These PS4S ride like 19" instead of 18" and I didn't expect that. What I much longed for was wet grip. The PSS HN isn't an adept for wet performance. We had some coolish rainy days (slightly below +10°C). In a nutshell, this PS4S delivered! Just what you'd expect from a contemporary 'higher performance' tyre.

Bought two of these for the rear wheels of my BMW 535d after previously having Pilot Sport 4. I am regretting this now as I get a lot of wheel spin when pulling away in damp or wet weather, I never had this with the Sport 4. It's too early to say what the wear rate is going to be but because of this constant wheel spinning, I'm not expecting to get that many miles from them. As a comparison, I got 30k from the Sport 4.

Too soft for the x5m50d very disappointed with the back tyres didn't last 7 months

I received a set of 4 Michelin Part no. 89946 245/40ZR18 MIC A/S 4 ZP Pilot Sport Tires in Oct, 2022. They were replacement for another set of defect Pirelli RFT Tires with rough ride problems. After trying to drive them with bad balancing evident, I took them to a second dealer who tried 3 times to balance them, including a forced pressure balancing, and in their report, said to return them to the original dealer which I did. After another forced pressure balancing by the original dealer, they were taken off and a warranty claim initiated with Michelin. Michelin failed in addressing the tires defects and issued no new tires or refund. Both Pirelli and Michelin appear to have quality control issues on tires built during the 2020-22 pandemic. Quality control is not what it used to be. I am contemplating at this point a small claims court action against all involved. I will never buy Michelin again.

Factory set tyre comes with my Civic 2020, on 30,000 km tyre started to crack. But still manage to use till 60,000 km in very bad condition. Performance is good but can't last long.

The other tires I've had on the car are Pirelli P zeros and Conti DWS. The PS4S works better on the RS5 than the Pirelli or Conti in all conditions I've driven them in. I was surprised by the other reviews talking about the lack of feel because these have given what was generally a fairly numb steering feel its best feel so far.

After having these tyres on my car for over a year new im totally sold by them. Theyre great and grippy, especially noticable in the rainy/ damp conditions. I've done around 6-8xxx miles in them and the rear tyres on my car are basically new, however fronts on the inner edges are approaching the wear markers so will need changing soon, and have melted the slits on the innder egdes together. This however might be something to do with my trip to scotland to do the NC500 which really made the tyres stand out giving my tons of confident to throw the car into the corners just knowing they will stick.

I have OEM Michelin Run Flats Sport Cup 4S on my Corvette C8. Regular driving these are fine. They are DANGEROUS for track use though. These tires are UNSAFE and have batch defects in my opinion and people should be informed before someone gets hurt. I followed Chevrolet's track prep guide for the car (that says this tire can be sued on track). I have been on tracks for 15 years and have never had tires delaminate like these and fall apart after 1 session of a track day. I called Michelin and there customer service tech said it wasn't a defect or covered. He pretty much said it was my fault and never even made the time to look at the images I had. Michelin did not stand behind their product. I will NEVER buy a Michelin tire again. Sad.

I have these(245-40x19f, 275-35x19 r) on a 370z, which is a 3300lb car. Wet and dry traction along with noise and comfort have been excellent. The handling responsiveness has been a little too vague and the impulse response of the tires seems sluggish, which I attribute to the very flexible sidewalls. The one characteristic I'd like to bring out is the phenomenally low tread wear on the tires. I measured the tread depth and tweaked the inflation pressures at 1k mile intervals. I haven't been able to rotate the tires but the tread wear has been perfectly uniform across the tread on all tires. The tites now have about 37k miles on them now and are averaging slightly under 50% for remaining tread life. The tires started with 9/32” tread depth and the fronts are now at 5/32", with the rears at 4/32".