Just went for a test ride. Ultimate test = no ear plugs and motorway..
What can I say - GREAT!! Obviously the noise was louder the faster I went but what a VAST improvement. It was bearable at all speeds, I wouldn't want to ride for long periods at motorway speeds without earplugs and probably will still wear them but wow, so much better. The noise from the visor rattling at higher speeds was almost the loudest bit!!

In part due to the Lazer being a particularly quiet helmet but still, impressive.
I also felt like the wind was deflected much more from my arms and hands. I was wearing Hein Gericke AIR mesh gloves and could feel no air movement through them. Perhaps not much good for the height of the summer, but I have a feeling the GIVI is going to remain on the scoot now, probably until about May 2011!!