I've used them the past 2 winters in ME and NH. As mtwarden says, they have their place. On trails or in terrain where you're not constantly stepping over downed trees, boulders, etc, I definitely prefer the Hoks to snowshoes. They're much much more efficient. You're gliding vs stepping, and that means more miles with less fatigue. Definitely a factor when the days are short.
In really steep country or broken terrain, snowshoes work better for me. Their shorter length and better traction makes it easier to step over obstacles and cut straight down slopes. (Even though the hoks have skins over most their surface, they're still speedy on the downhills...that's great on open terrain, but it's a liability on steep, forested slopes.)
I have a couple of buddies who are foresters who use hoks all winter. Both ditched the universal bindings and swapped in 3-pin bindings. They say the difference was night and day when it comes to downhills. If you're using the universal bindings with pac boots or neoprene boots (that's what I do), you simply won't have the rigidity to crank out telemark turns and use these as true skis.