I ride a C17 in jeans and non-bike-shorts and it is super comfortable for me. I'm the kind who doesn't like super-hammocky "broken in" b17s, and finds them comfortable out of the box, but I ruined my last B17 in torrential rain in Portland. From what I read the C17 is designed to mimic the feel of the B17, but I was skeptical because it's significantly more curved across the top. I tried one with the cutout and was immediately sold. I need a slight nose up on my B17, I set up my C17 with what looks like the exact same angle and it feels just as good.