I rode a Domane 6 series at a Trek demo event for about 45 minutes. Definitely the smoothest road bike I've ever ridden. Not really for me though, feels a bit too muted. I think that I'd probably choose the Emonda over it. I'm all for a consumers having a range of choices from harsh to magic carpet ride. I think this Domane SLR with 28c GP4000S II tires would be an amazingly smooth ride for those who ride on really crappy roads and don't want to settle for a cross bike or gravel grinder.