Originally Posted by faber
I found with Flexons/Kryptons (some experience in Kryptons, none in the "new Flexons," lots in the old Flexons) that I was flexing, actually bending the knee, a lot more to get the same desired outcome as with conventional overlap boots. This changes the physics of turn initiation and shaping considerably: affecting whole-body flexion/extension, preventing you from keeping your "long leg" long when you need to, not allowing you to stay "stacked" over your edges in the most efficient way, bringing the hips out of alignment when angulating, etc.
As terrain changes (e.g. bumps, steeps) these issues will be magnified.
I don't know what "stacked over the edges" means, but the progressive flex and lateral stiffness of the Kryps allows me to carve in any snow condition like no other boot. It's easy to get a ski on edge, but try riding that carve smoothly and continuously through bumps or radically broken heavy crud. With a stiff flex boot you are in an almost constant fight to keep just the right amount of pressure (but not too much) on the front of your boot and your ski(s). The Kryps allow me to essentially relax into the flex of the boot and let it do alot of the work for me. It is exactly like the difference between skiing bumps on a ski that is too stiff and one that has a nice mellow flex that works with the bumps instead of fighting them.
I know I am starting to sound like a self-appointed Krypton expert and salesman in my posts about this boot, and I am certainly not either. Obviously, it is not an easy boot to jump into and immediately ski well if you are coming from a conventional high end or race type boot, but for me and some others it is a huge step in refining the connection with your skis and the snow. There is a lot more going on with the flex of these boots, which makes them much harder to "figure out," but for some of us it was worth the effort.
My wife is 5'5" and less than 120 lbs. When she switched from Technicas to Flexons she was almost in tears and literally could not ski for 3 days, but I encouraged her to stick with it. Now (10 years later), I would bet that most of your would have a very hard time keeping up with her in bumps, powder or crud while she skis on Rossi B2s, Chubbs, or Volant Super Carves, all in a 170, which by most standards should be too long for her. Our personal experience is that these boots work very will for driving all but the stiffest skis, but as evidenced by many of the posts here they are not for everyone.
Be warned, Kryptons, Full Tilts and Flexons will screw up your skiing and require a change of style! Depending on the individual this may be a very good or very bad thing.