I have a two stage Craftsman, 9 hp, 26", self-propelled, electric start, with a light. It lets me clear our double, 50' driveway in about 20 minutes. Best thing is, after the City plows the street and creates a 2 to 3 foot icy berm across the driveways, I can clear that in about another 20 minutes. THAT takes about an hour by hand, on a good day!
It clears down to about a 1/4 inch height, but at that height the sun can evaporate the rest.