I'll offer a little more feedback. As for seeing over the medium height screen - no problem. I'm 6' tall with 34" inseam. It's always a good idea to state both height and inseam when talking bike ergos. A 6-footer with a 32" inseam probably sits taller in the saddle than me because they're longer above the waist.
When I say it's no problem to see over the medium screen, let me narrow that down to low position and unladen bike. I can still see over it in the high position, but just barely. I recently rode 2-up with my wife for a weekend, luggage and all. With the rear pre-load cranked up to 4/5, the top of the screen was still higher than normal (too much rear sag). On the return leg of the trip, I set the rear pre-load to full (5/5), screen to low position, and the ride height was back to normal, line of sight improved. Now I know.
On my most recent excursion, solo with camping gear and the rider sag adjusted, I noted a new phenomenon. This trip took me down 50 miles of dirt roads (yeah!). What I noticed about that is that my visual focus is much closer in compared to highway riding where I lift my eyes to look as far down the road as possible. With lower speeds and more technical riding, the larger shield is a disadvantage. This is not a comment on the V-Stream, but any larger than stock shield. Next time I'm planning off-highway, I'll switch to the stocker.
I previously noted that the V-Stream sport/touring screen (probably true of any larger screen) is more affected by crosswinds. Feels like someone is grabbing the bars. Since it's been very windy lately and was in the 100+ temps, I switched back to the stock screen. Definitely more stable in the wind. I am also reminded why I bought the V-Stream - more wind protection, less buffeting, less noise. At least swapping is a 5-minute easy job.
