To resurrect this topic rather than start a new one: I installed a Slipstreamer windshield on my B5 in early November. I expected it to improve the aerodynamics, and I believe that it did, but I hated it.
The problem was that it took all of the air off of my chest and redirected it to just above my neck, making for a very, very noisy ride. I adjusted it so that it stood up as much as possible, which helped the noise somewhat, but the air underneath then found a vacuum and began to flow vertically right in front of me. Adjusting it in between those positions resulted in various uncomfortable combinations of the two uncomfortable extremes.
Fortunately, my wife was in a panic to get out of the house one day and realized that she had left something, so she backed out of the garage with the car door partially opened, and broke the windshield. (I only paid $48 on eBay including shipping, anyway.) She also knocked the right-side signal light off. I reattached it, but really need to replace it.
This is fortunate because I hated the windshield, and I also want some smaller trafficators! (One bad thing is that I already drilled holes in the sides of the headlight nacelle to mount the 4-point-attached screen. Pained me to do that! I can get a new 4-point, or get a handlebar only mount and plug the holes, but it'll never be the same.)
I would like to have some wind protection, however. I'm only 5'9", but I suppose the windshield I had was still too short. Does anyone have a screen that they like? Down to about 50 degrees F I don't need a windshield for the temperature, but I'd like to ride when the morning temp is closer to 40.