I do wish I had that (Aeroflow) windscreen for my trip to Indianapolis last month. What a difference! All the way up, no back pressure and blessed silence! Also much smoother (less turbulent) airflow with it in any of the lower positions. I thought the stock windshield was a vast improvement over the windshield that came with my old TMAX. The Aeroflow makes the stocker look as bad as the TMAX shield.
Rode with it in the rain for the first time today. Not as effective as the Aeroflow windscreen on my K1200LT, but still a whole lot better than stock. What I don't understand, is that BMW has one of the largest wind tunnel facilities in Europe. Why in hell can't they come up with a DECENT windshield for their bikes???