I just put a thousand miles on mine over the last week. I am 5'11. 2018 ATAS. Seat in low position. 30" inseam. Screen is 18". I can ride without earplugs now. Wind doesn't hit my chest anymore and there is very little turbulence, if any, and 80mph. Air still hits my arms. The crossbar for mounting things is useless as the screen will bounce like crazy if you do and it looks like the **** thing will fall off. The upper half of the adjustment range is useless for the same reason, but you want the screen low so it covers the AT "ears" by the dash. That's where the turbulence comes from.
The screen doesn't actually look bad at all. When adjusted well it blends in with the bike.