I just started this year at 59. I have flat on one side and clip less on the other, so I have the choice. When I’m in town, I tend to use the flat side so I’m not clipping in and out. I really wasn’t sure if I’d like to be clipped in, but I do prefer to be clipped in, but not if I’m going through a bunch of intersections. When I have a few miles with no stops ahead of me, I’m clipped in.