That looks awesome on that bike. How does it function compared to the stock shield? Better, worse, no difference.......
I was impressed with performance at all speeds where the front forks actually compressed a couple-three inches, planting the front end. This differs from my 09 SERG where that bike felt lighter in the front end with all kinds of windshields...almost squirrely at high speeds.
The stock 15' windshield is very good...very, very good at all speeds in fact. The KW shield with all vents open and me (5' 11.5")sitting bolt upright made the bike feel extremely stable at speeds all the way up to and above 100. It seemed to create a very stable bubble the faster you go.
So, IMHO, the KW Sport is as good or better than stock. I feel lucky that I nailed it on the first try.
P.S. I had the impression that the KW windshields for the previous pre-2015 RGs were all form with little function. The new KWs have form and function dialed-in. Individual mileage may very.