I just came back from my first session after switching out the stock steel on my One70s to Step Speed. I have had my skates sharpened a fair bit and the original steel was getting quite low, and as was pointed out by the guy at the shop, the profile was very badly managed (I tend to just get them sharpened wherever). So, I needed new runners anyway and was not specifically looking for Step, but the place I was at step is what they had. No problem says I, throw em on. Granted, the stock steel on my One70s was the lower grade "tuuk super stainless" or whatever, but I wasn't really expecting to notice a difference, I mean steel is steel right? But holy cow, did I ever notice a difference. Maybe this is all in my head, but they just felt... smoother, somehow. Way better glide. The turning felt more solid as well. Just a first skate, but man, I will be recommending these as replacement steel to anyone who asks. very happy customer right here.