Got my vstream screen from ztechnik. It is about 2cm taller than the BMW tall screen and quite a bit wider at teh top and the bottom. It also has a completely different curvature. With the screen down the edges only just miss the mirror mounts. I guess they put extra width for when the screen is up. I think it looks good. I've only been for one quick ride last night and with it up it is a vast improvement over stock. A near silent ride. I'm 5'8 and with the screen all the way up I look through the screen. I can lower it about a quarter of the way so I look over it and the noise levels don't change. With the screen all the way down it is a bit noisy but fine up to about 80km/h. I'll get a better feel today after about a 70km ride and will add further comments.