+10 on the turbulence off the OEM screen. I had a Parabellum screen on my S, but it exploded when the bike got dropped while I was moving it in the garage. Very, very fragile plastic.
The best solution I found was to get a used screen and cut 4-5 inches off the top. That puts the turbulence on my chest and the helmet in clean airflow. A bonus is that the shortened windshield looks a bit more modern and a lot better than the taller stock unit.