I've put 700 miles on the Creo 2 on flat pedals. First bike in 20 years I've had flats on. I don't love it. Because these bikes love a high cadence, I find that when things really get spinning my feet almost come off the pedals. Also when bouncing around on rough roads, it can be annoying to have my foot position change on the pedal. My original thought was I'd ride it more just for fun around the neighborhood without wearing a full kit. I've done this and it's great fun. But when I'm out on a 3-4 hour ride, I think I want to go back to clipless. I even bought some Giro shoes for the flats but prefer and I love my lightweight carbon fiber sole, boa strapped, clip-in Giros.