Fairings, even BMW ones, do come with various downsides including buffeting and turbulence behind the screen, and some serious stability issues at speed and in side winds, pushing through the turbulence of a semitrailer at speed can be very scary. I prefer to use an S fairing, coupled with short bars and a tank bag, this seems to give me a lot of protection and at 5'7" puts my helmet in clean air. iMHO etc etc charles