Feedback on Windscreen -
So I bought the Cadillac windscreen. The good - it does a very good job of cutting the wind that previously hit me from behind and blew my hair forward. Cuts almost all of the back draft. On the expressway, with the windows down, there is still quite a bit of wind from the sides. With windows up, just a whiff along the top of my head. I have not noticed any sagging in the screen as reported by Bill, but the screen is still new so time will tell.
The bad - I can see through the screen fine during the day, but at night it makes it hard to see through the back window to back up. Since the Windrestrictor (that is the competitive product that is a sponsor of this site) is not very expensive (without the light and laser etching), I think I will order a Windrestrictor as well for comparison. My only concern with the Windrestrictor is I read somewhere else that the solid screens channels a small amount of back draft off of the restrictor against the back of your head. (I do not know that to be true, just what I read.)