I use Phiokka PH1 since 2 years, and like Nils said, thay are good, rigid, and precise binding. I have experimented breakage of levers, but only with Head shoes, not with Raichle. This problem was solved by using Snowpro levers.
Regarding initial request, I agree with Nils. They are too stiff for freecarving. I use them on my Swoard on groomed hard snow and like the accuracy. But I tried them on my Donek Axis (same program than Prior 4x4), and don't like the feeling. This (kind of) board works better with softer bindings, especially on bumps.