I have had my Flows for what will now be my 4th season. They are great. As one other person pointed out, the Flow boots help with a fit. I had tried other step-ins (Clicker, Switch) and had real issues with clogging of snow in cracks and the need for precision movement to get the device "locked". I can get my foot into the back binding while still on the chair, so it's straight to the slopes (if there isn't a flat runout at the top!).
I can carve a pretty mean trench with them, but the boots are soft, so there's some more wiggle room than I would like to see. There can sometimes be a gap between the boot and the top fo the highback, even if you try to get in as tight as you can. I'm taking on a hard boot setting for the first time this year, but I'll still keep my Flows and all-mountain board for those "less than cordoury" days.