Alright, I got these last night and had them mounted up. I mounted them 9 cm back from the John Olson mounting on them as thats what they suggested for all mtn. The John Olson mounting, from my estimation is dead center. I mounted them with a pair of my old Rossi Race 120's (Yea laugh at me since I've bashed these, blah blah blah, Its what I had available).
Conditions were 10-12 inches of fresh dry powder. A little heavy though.
These skis are stiff, damp, and love to turn. You can just roll them over and expect good edging, super easy to initiate. While I couldn't test edge control in depth, the ice where the powder blew off of suggested good things to come. I'm not sure how much pop you can expect coming out of your turns as I couldn't do some serious carving. Being stiff though, I think you could load it up to pop pretty hard.
With a 79 underfoot, I wouldn't say this is much of a powder ski. I had to work to keep it afloat. Also keep in mind though I'm an NE skier who skis powder only on a handful of lucky occasions and really hasn't mastered the pow. I did like being able to launch 10-12 foot drops without having to worry much. They felt nice and stable landing them too.
The sidecut on these skis lets you carve a wide variety of turns. At 19m it can start to approach slalom territory, but with its stiffness and not super small turn radius keep the stability of GS ski. They love to get moving and have the balls to sustain it.
As the day wore on the snow got pretty chopped up. The ski could ride through the chop about as well as one could hope, but only if you were willing to push it through.
I did hit a small jump some kids made and I thought even being back 9cm on the mount, they were balanced and manueverable in the air. While I wasn't throwing hard as I only hit the jump a handful of times and threw a 3.
In short, if you want a twin tip that you can charge hard on the mountain, I'd suggest this ski.