Took the Kuhmo's on the track on the weekend. My first track day, so I don't have anything to compare them to, but I found they went alright. Spun out a few times, but I put that down to me being too trigger happy on the throttle
Grip in general was quite good, although it could definitely have done with more. But when you're hard cornering at some ridiculous speed (I didn't look down to see how fast I was going) you can't really blame them for not quite having as much grip as slicks. Noticed a bit of a whine when I was doing about 140+, but that could also be due to alignment issues (it's definitely out, even when doing daily driving).
Tread wise, I'm not sure exactly how much it went down, but there's still a solid amount left, so they lasted the day without getting annihilated.