I am on my third set of Shinko Verge 011.
To give you an idea;
First set were replaced after 15,200 KM (9,500 miles) due to a puncture. If not for the puncture, I'm sure that I would have ran them another 1,500 KM or so.
Second set were replaced after 18,300 KM (11,400 miles) and they were worn past the wear bars.
I didn't really pay much attention to when they started to square off, but I don't remember it being particularly premature.
I do not have any real complaints about their performance wet or dry. The one thing that I don't like about them is that there is no tread in the centre of the tire. This is not an issue to me because of performance or confidence in them. What I have found is that this also means that the tire wear indicators are on the sides where there is tread. Unfortunately, most of us tend to wear the centre of the tires out first. This tread design/tire wear indicator location I find makes it hard to determine how worn the tire is in the centre. This makes it hard for me to decide if I have enough life left in them for a trip that I might have in mind.
The below photo is an example of this. The tire wear indicator is off to the side quite a bit. It shows that there is rubber remaining there, but how much is remaining in the centre is harder to determine as there is no tire wear indicator there to reference. The PR4's that I had on previously had tire wear indicators right in the centre of the tire making this determination easy.
They were wallet friendly. Used to be that for every two sets of Michelin PR tires I could buy three sets of Shinko's with the same amount of money.