Personally, I don't see the point of traditional one steps past yellow belt. The punch most encountered in the US is a wild haymaker followed by another wild haymaker followed by another wild haymaker, etc. I also don't think one steps teach a person how to read an opponent. When I do one steps now it may be a front punch, a reverse punch, a kick, two haymakers and a kick, or any other kind of attack. We practice one steps as one package of techniques not a single front punch. This is a training preference but I've seen better results in transferring the techniques at least to sparring this way.
