Originally Posted by canadianskier
part of the design flaw of putting the locking lever under foot rather than behind IMHO.
I'd say putting the lever under the boot is a design consideration, not a 'flaw'. The binding CANNOT switch modes while the boot is engaged, switching modes, or 'insta-tele' has been a well known problem with Fritschi and Naxo.
My personal experience with uphill mode on the Duke is extremely favorable. I really like the binding for climbing, it is only a touch heavier than a Naxo NX21, it skis 100% better... and let's be honest, binding weight is the LEAST of my problems when it comes to skinning. The climbing post is a little hard to access, especially when it's dark out. The mid-level height is impossible to switch out of without using a hand. If there is a flaw, I'd say having the climbing wire on the moving heel instead of the base plate is it.
If you want the ability to switch between uphill and downhill mode and pull skins with your ski on, it's the wrong choice. If you want to compete in Rando Rallys it's the wrong choice. Dynafit kills it for these tasks.
If you want a binding that you can ski on funky snow, if you want a binding that let's you climb but can still drive a big ski, it's the best choice available. It doesn't 'ski alright (for an AT binding)', it ski's WELL (PERIOD).
I've spent about 25 days skiing on a pair and about 10hrs skinning on them, I love them.