My take on Gen 1 wind screens:
I have a Secdem screen that is near factory quality and a few inches taller than the ZG. It costs about $120, they are imported from France.
Here's my take: stock screen is sporty & does a good all round job, clear finish doesnt look cool.
ZG Sprt touring: gives slightly more wind protection, does increase steering effort at speed, dark finish looks cool, cheaper quality.
Secdem: Better wind protection (not great), looks best, good quality, buffets pretty bad at 125 mph + indicated.
Keep several screens around for your type of riding.