It's a three-buckle design plus a very burly power strap. I didn't ask Rick about the flex, but having seen him ski them on the VERY hard snow conditions we have at JH right now, I'd venture a guess that it's a stout enough downhill boot for just about any skier. Rick just rips on any kind of equipment, but I couldn't tell that he was on an AT boot until I saw him in the locker room.
The boots will have removable DIN soles, but the coolest thing is that he's nearly certain that the boot is going to be DIN certified for the textured AT soles as well. The textured soles came within a whisker of passing the DIN test recently and they're tweaking the material right now with an aim toward certification. That would be a very big development in AT boots.
Also great: the boot is Dynafit compatible.
Keep an eye out for this one. It could be worth considering.