I recently went to a F1, Dynafit Vert ST, K2 Sahale/Rally set up for light/fast touring and fitness laps at the resort (lots of vert, well at least for me...). The F1's are exactly what I was looking for: lightweight, comfortable, awesome on the uphills, and perform decent coming down. I have a fairly wide forefoot, med high arch and a narrow heel. They fit me really well. I've skiied them on hardpack, soft groomers, spring slush and powder, and they surprised me how well they work in all conditions, although I feel you have to be more deliberate in your skiing, that is, they take some effort to perform well. But the trade off between being superlight and comfy on the uphills is well worth a little performance loss on the way down in my opinion.