I have about 3000 mainly commuter miles on my 38mm gk slicks running them tubeless. I had to warranty the rear after ~500 miles because the casing seperated but I've only had 2 punctures that both sealed before I needed to pump them back up. Definitely not as durable as the tyres I replaced (pasela tourguard) but so much nicer to ride. I'm happy enough with them that I'll replace with the same when I wear these out.
I have about 3000 mainly commuter miles on my 38mm gk slicks running them tubeless. I had to warranty the rear after ~500 miles because the casing seperated but I've only had 2 punctures that both sealed before I needed to pump them back up. Definitely not as durable as the tyres I replaced (pasela tourguard) but so much nicer to ride. I'm happy enough with them that I'll replace with the same when I wear these out.