Only three modest rides so far, but the GK SS 43s feel really nice. Using tubeless, about 35 psi. Dry gravel and pavement. Removed some 38 Rene Herse ultralights because the sidewalls were getting shreded. Expected a duller ride--but pleasantly surprised. Mounting was easiest tubeless ever---popped immediately with compressor. (I set them in sun for 30 minutes after unfolding, and rim was still moist.). Ride is supple. Tread is quiet on pavement. Durability remains to be seen, but they feel really durable.