I used/use the original Inov-8 dobbed shoes over the winter, found the grip on ice and snow to be fantastic and a potential lifesaver on the high fells. I can't say I noticed much disadvantage once below the snow line in them either.

Only problem was many of the tungsten spikes fell out ripping the studs, I should return them, it's supposedly cured on the new ones.

I wouldn't be without a pair for winter now though.