I have now done 1000 k on my Karoo 3's. Very mixed riding (Alps) with freeway, highway, narrow mountain roads, gravel, mud and river crossings. They perform fully as expected. Outstanding road performaces (for a 50%-50% tire), very nice on the gravel and dirt. Main drawback seem to be under muddy conditions, where they clearly do not grip like knobby (no surprice). I will monitor wear and let you guys know what I find.