750 km on my new set of GP 4Ks II. 1 front pinch flat (AT) 200ish km which is totally my fault.
I have ridden on some glassy roads like M2 and Pacific H-way. While washing the tyres yesterday, I noticed some glass cuts. Some of the cuts with the glasses still in them. None of them have caused any flats which leads to my conclusion that the the puncture protection is somehow working. Both tyres still have the excess rubber in the middle, a good sign that I can get more km on them compared to my Veloflex's and Vitorria Corsas.
Manufacturer weight claim is spot on according to my digital bag scale.
Paired with Vittoria Ultralites, front pressure used is 95-100 while the rear is 100-105 PSI.
The rolling resistance is comparable to the 4 seasons and GP4ks I. Sorry I can't tell the difference between the 3 models.
Grip I think well above average. 20% of the 750 km was ridden on wet roads. Compared to my Veloflex's and Vitorria Corsas, these tyres seems to stick on the road on those abrupt braking.
I'll post more updates as I use them...