Lindsey Clark wrote a review of Dynafit One PX - TF Alpine Touring Boot - Women's on February 14, 2013
Familiarity: I've used it once or twice and have initial impressions
I took these for a few runs in a ski area during a demo, and pretty much immediately knew I needed a pair. They are unlike anything I've ever had on my feet. My husband has been skiing the Dynafit TLT5 and calls them his "mountain slippers" because they are so light. The awesome part, however, is that they get pretty stiff when they are buckled down, and can definitely shred.
These are an evolution from that TLT5 design, with one big difference that made me get serious about these: there are no stupid, extra tongues to carry around and deal with on your tour. I hate that!
I doodled around the base area a little with my heels unlocked and the range of motion was amazing. I've never felt anything like it! And have been skiing in the backcountry on Scarpas and Garmonts for the last 7 years.
The downhill performance was great. They got pretty stiff (a legit 110, from what I've been told), and I railed on some super firm groomers without a second thought.
Super light, easy to transition from hiking to skiing, excellent rotation for the climb, and a crazy heel pocket that locks you in... I can't wait to get these babies on some of our big volcanoes!