I noticed with my K2 Cinch that it's difficult to get my boot in and out because of the angle when the high back is open. Flows open flat, Cinch only to about a 35 degree angle or so. I ran my Cinch for 1 season and by the end of the year the rubber on the highback is completely torn off and the inside of the ankle strap is shredded from me trying to manuever my boot into the binding. Sometimes I'd wipe myself out trying to get my boot in and out. Once I got my boot in, it was a nice tight fit and I really liked the binding overall.
This year I switched to a Salomon traditional entry binding.