Just adding a 'me too' - I use spds and never have a problem walking around with them. BikeHubby has Look, however, and is very careful walking in those - tries to avoid it at all cost- since they are plastic. I did have cleat covers for my old, old, old clipless (I even forget what they were), because they were so slickery to walk in and if I was stopping for breakfast/coffee/whatever, and walked into a place with tile, I had to really concentrate on keeping upright if I didn't have the covers in place.