I'm not positive about this, but we may be having terminology issues here. When you say "step ins", I wonder if some people are thinking of those click-in plate bindings. Flows and Cinch are more often described as "rear entry" or preferably "quick entry" since the first phrase just set some comedians off
Yes, the first thing that popped into my head were those god awful click-in bindings with no highbacks that I had when I was 10
If anyone still actually uses those, please unscrew them and proceed to throw them in the nearest trash can.
PowderHound and TreeNinja