Parabellum fitted to F650GS
I bought one about 18 months ago, an 'extra height' one 2inches higher than standard.
Rider and passenger can ride at 70mph with visors up and talk to each other. It looks really odd 'cause its so big, but does the job perfectly. I first thought it would make the front of the bike feel light at speed, but it didn't, I thought it would make the wind buffeting - such as passing large lorries at speed- tricky, but it didn't. Can't recomend them enough.
Downside? riding at night in the rain because you look through the screen rather than over it, oncoming headlights scatter light so you need to keep it clean.
After 18 months of use and cleaning, it does have some small scratches on it which can refect and defuse the light a little when the sun is in front and low in the sky.