Cant understand why so many people are hard on Burton, im sure you havent all riden the ICS system.
I use the ICS/EST system with EST sole boots.
at first my bindings would loosen up, its not hard to tighten them up at lunch, then your set for the rest of the day, isnt that like everything new??
after about 1 week, my bindings dont move, at all, and i love the est system, personally now i wouldnt go back to the old system, i know this limits me to burton, and there out there prices
i ride a 151 custom, with cartel est binding, ozone boot.
just hang in there. mine did the same, then stopped, mind you it is 09, but a nut and bolt is just a nut and bolt.
i was skeptical on the system at first, i am a walking burton billboard, as in Australia, its the only brand which all there range is carried, its hard for me to find what i want in other brands.