NEVER! :)
Just kidding - I have a pair. I just don't like putting anything on my feet other than running shoes.
It does seem to be working for you. :)
I'm with Storm on this one.
Kilian Jornet and other big name ultarunners do the majority of their off season training by skitouring. Although I guess skitouringbis a bit difficult if you don't live by the mountains.
You seem to do pretty well with a canoe or a kayak attached to your feet STORM.