I wonder what the blade life is, and how quickly people would balk at $60 every year.
My experience has been, start the car and let heat do the job on the windshield. Once or twice I've had to just let it run, after a bad storm. Beats scraping--and these blades will on deal with ice next to them.
I just picked up a bottle of Prestone deicer, in a spray bottle, am waiting to see what I think of it this winter.