A few years ago I had a friend who had just gotten an accord(used, but nice). It was winter and he was having trouble accelerating in snow and sliding at stops or in turns, often understeering badly. I kept telling him to put a set of Blizzaks on. When he finally did he was shocked at the difference it made, not just in the deep snow, but in all the situations that pop up throughout the winter, like slush, blowing snow, plow lines pushed across intersections out of the blue, etc. At the time I had a new 4X4 pickup that was exceptional in the snow. After he put those Blizzaks on that accord, it was actually better than my 4X4, and not by a little.
The snow, slushy, wet, ice grip is almost unbelievable, even on snow covered roads it accelerated and stopped basically as it did on dry pavement.
Its one of those things (like rain-x)that just makes your car so much safer that I am surprised they aren't mandatory, what with all the safety regulations and parts they force already. I'd be willing to bet that if every car on the road had them, accidents would practically drop back to summertime numbers and tow truck drivers would get to spend more time with their families when it snows.
Its really hard to describe the difference they make without sounding like you are exaggerating or selling them or something. But use them and you will be just as impressed, guaranteed...they're ridiculous!
I drove several GMC 3500 vans while I was still working in the field. I always had a lot of weight: truck was at max payload almost all the time, sometimes over. About the best tire I had used for both traction, wear, and cost were Firestone Transforce A/T.
Those wore very well considering the load, and I always kept them at 60 PSI on the fronts, 80 PSI on the rears. They did give up a little grip in the wet, but not enought to be concerned. They worked well in the snow, and was surprised how well they got traction when I drove into remote jobsites that had little or no snow removal performed.
I wonder how many said, 'that guy is driving like a nut, I'll see him in the ditch ahead'. I'd gladly stop and compare tires if they wanted. I didn't crowd anyone, but as able I motored safely along. With Winter tires there will be those stretches when the roads are clear, they earn their keep on those snowy days.