Snow blades are great for snow. It's the wet roads after the snow is cleared that I didn't like them for. I always ran reg. wipper blades all winter long. And besides they look like "old man" cars when you use them.
Do what I did, move to Florida. Wait, I think I will buy a set. I'll look like a snow bird.
If you clear your glass of snow and ice, you don't need them.