I installed a set a few years ago on one of my cars and had issues with it lifting off the windshield. Since it is wrapped in a rubber cover, air couldn't flow thru the blade and it lifted off the windshield at highway speeds. Not sure if anyone else has experienced this.
For normal blades the way they are shaped along with the grooves in them allow for the wiper to be held down on the windshield by the wind. This can also be seen on the newer wipers with the spoiler wing on them. When the winter blades are put on they won't have this so at high speeds they could lift off the window. You might have to get two sets, one for severe winter conditions and another for normal or mild conditions.