Modern Flow bindings got rid of the powder problem with their redesigned mini ratchets. After the initial setup, you can just undo the outer straps and ratchet down like normal bindings when in powder. The SE versions starting from 2010 takes this a step further by only employing two ratchets on the outer ladders. The two inner straps are tooless adjustments like with any other traditional binding.
Stepping into them does take a little getting used to, but once you get the hang of it, it is quite easy. Those weird angles (digging toe edge into the snow) isn't hard at all. I'd much rather do that than sit down or stay bent while strapping in. Modern Flows are also much lighter than they used to be. They rival some of the lightest bindings around now. The major selling point of Flows however is the pure comfort. They give your foot even pressure distribution to prevent soreness. You know, sometimes you ride hard all day and your feet start to hurt by your toe and ankle area? Non-issue with Flows. These are two of their top level bindings:
Flow NXT-ATSE Snowboard Bindings 2011
I own these (2010 version which is no different) and absolutely love them.
Flow NXT-FSE Mens Snowboard Bindings 2011
The SE versions are super easy to set up thanks to the above mentioned features. Just lace up, step in, ratchet down and kick back out. Now you're ready to shred!