I am a bit of a taller rider and the stock windscreen on my '08 Yamaha R1 wasn't keeping the wind off my helmet as much as I would have liked. I purchased the Double Bubble windscreen in Smoke and it was very easy to install. The fitment was perfect and from the bag to the bike it was a five minute job. There is less wind buffeting when I ride now and my bike looks better, too! I would definitely purchase another Zero Gravity Double Bubble windscreen.
I upgraded to the Zero Gravity Double Bubble windscreen for the Yamaha FZ1. It was a big improvement in wind protection over stock and the optical clarity was also very good. Installation was easy and it fit the fairing as well as the stock part.
Product looks really great, but I had to return it as it does not have the required four mounting points for the Honda VFR800 but only two mounting points although the website claims it is suitable for a VFR800. Using only two could maybe work, but seems a half-a solution. Givi screen has sharp mounting eyes that crack in the corner after a year in the heat.