I’ve only done 4 rides on them, and nothing overly long yet, but i can easily hold 30kph on flat roads (Lincolnshire) and for the flat bridleways and tow paths round here they are great (not ridden in the wet yet)
is there probably better tyres out there no doubt, early adopter and all that, had the same when i bought a Krampus, choice of 1 tyre, i guess it just depends how you split your riding and what your local gravel/trails are like (the uk isn’t Utah, theres not 200 mile gravel loops etc)
i do wonder how much road speed id lose if i switched to WTB Byways, Terrene Elwoods, or the new Panaracer Gravel King 650b x 1.9″ (spotted on Instagram)