Last winter I rode with the California Scientific.
Triumph Rocket III Windshields
Definitely kept me warmer, but sitting at 6'2" and using a full-face I felt extra wind on the helmet. Kept all the wind off my torso, and sent turbulent air straight to the face. I like the way it looks on the bike compared to some of the other offerings, though I like the way the MadStad screen that's on Atomsplitter's GT looks great, and you could find some of those on
ebay