I've been riding flat clickers for years and am loathe to give them up because of the boot fit - no heel lift with my narrow ankles. At 52, I hope they last as long as my knees. I even got some back up boots and bindings on ebay.
The Clickers have been good for me for freeride, resort and BC snowcat ops. My son uses Flows and likes them. I've considered Flows and Cinch but every time I heft them they seem heavy (at least compared to my current set up.)
The only problems with the binding are when they ice up or if I have to click out in deep powder. I like being able to click in on the lifts, particularly if the lift has a steep ramp at the top.
I only ride about 12-15 days per season so they may last a while.