I see a lot of guys using these skis in the parks around Norway, they seem to be very popular. Once when I was at my local ski shop during the winter there was a young man inquiring about ordering a pair as the store was sold out, the store manager checked but they were sold out pretty much everywhere in the country he claimed, so he would have to wait until next season.
I'm strongly considering a faction ski for park/allmountain next year myself.
Not really a review but demand should say something about how good a ski is, hope it helps.