snowtiger wrote an answer about Madshus Annum Ski on November 8, 2010
I believe that this is the exact same ski as the discontinued Karhu XCD Guide. I have a pair of Guide's that I mounted dynafit Vertical bindings on, and ski with a pair of Garmont Radium boots. I've heard (unconfirmed) that someone skied K2 in the Himalayas on a similar setup. You definitely can't charge with them like you could with a fat alpine ski, but you can ski anything. I've dropped 10 footers, skied 40+ degree pitches in conditions varying from powder to ice. They are a bit floppy at high speed, which means you need to really be on your game. If you try to muscle them, you will oversteer and end up with your tips uphill. The dynafit bindings are lighter than the lightest 3-pin/cable tele binding on the market, and give you an essentially frictionless pivot-point for touring. I live in Vermont and have found them to be an ideal ski for exploring in the woods and for long tours in the Adirondaks where you have 5-10 mile approaches combined with big-mountain descents. You definitely want to get full skins for climbing. This setup is also a ton of fun for nordic skiing. Its a bit more work than a pure nordic setup, but I have gone out with friends on nordic skis, had fun, and kept up just fine. If you are considering a setup like this, you should also look at the new Rossi BC 125's. I just got a pair, same bindings, but haven't skied them yet. They are a lot stiffer and 95mm underfoot. Probably better at the alpine, worse at the nordic.