Use these as my street tires, in 255/35R19 front and 275/30R19 rear, mounted on a set of Volk TE37SL wheels (19x9.5 & 19x11) on my extensively modified M3. For reference, track tires are usually PS Cups, or Nitto/Hoosier R-comps.
First off, these are the ONLY Street Tires I have run on this car that aren't immediately overpowered by the brakes, which are StopTech Trophy 6P/4P 380mm/355mm 2pc that I use for competition. Braking distance is better with these than anything else that is daily driveable, and in the wet I have more traction than I would have ever thought possible especially from these widths!
With a quite stiff race suspension, these tires have improved ride quality and decreased noise, with no perceptible change in NVH since new.
Control is phenomenal, with very good feedback and they are very communicative as to their limits, while allowing throttle on oversteer but being perfectly easy to reign back in.
Since going with these for my M3, I have also swapped to them on my GT3 RS and they're every bit as good there.
Another benefit is that they weigh in at about 2.5lbs less than other comparable tires, and in my pursuit of decreasing drivetrain loss as much as absolutely possible, the extra 10lbs of unsprung weight combined with the 28lb from the wheels is immense.