I find it is far better then stock. I have the 16 inch and I am 5'9. I do get some helmet buffeting at 70 + mph at the very top of my helmet. I have the windshield adjusted almost to it's lowest setting. The wife is shorter then me so I needed to get the lower shield. I like the look and build quality of this windshield. The windshield is very adjustable so you can get the height right where you need it. It adjust very easy. I find on the freeway I am no longer a sail. I think this is a very good windshield.
Have you had any issues with the windshield becoming loose from the mounting bracket? I installed mine a couple of days ago and the instructions warned against damaging the rubber well nuts by over-tightening. I went for a ride and noticed the windshield vibrating. When I got home, I found that all four screws needed to be tightened again.