Haven't been stuck in deep powder (yet) where I can see the Flows becoming a liability. Will get me a pair of two-strappers when I find myself in those conditions on a regular basis. Untill then, no wet butt, ride off with my skier buddies...
Nor have I, my 1st pair had the power strap and to undo the ratchets is no more difficult than a pair of traditional bindings. The new design is even easier.
I'm like you, love 'em and not looking back