I used flow bindings all last season and they were not bad at all. The straps did not wear down at all and once you figure out where your fit is, lowering the back is the only moving part. It is very easy and you will always be the first one strapped down off the lift, sometimes without even having to sit.
Otherwise I have to side with linvillegorge on the responsiveness. I really did not notice the difference until I used a friend's targas for a day and it made a big enough difference to go back to strap bindings. The lack of being able to control the two straps individually, the back sometimes opening up open during the run and the difficulty in adjusting made me switch to targas this season.