I've been wearing one for a week.
Pros:
* Good fit on my average, oval, small/medium sized noggin (med sz helmet)
* huge field of vision
* invisible shield
* cool looks. The Blue Strike model is a nice match with the Impact Blue bike
* low price
Cons:
* weird buzzy vibration on the Super Tenere. My HJC IS16, Shoei TRZ, & Fly MX w/goggles helmet are normal. In clean air, standing or on my WR250R, there is no buzzy vibration.
* beware if glasses you wear. There is no good cutout in the cheek padding to accommodate glasses. You can wear glasses but the fit is not great.
* $100 helmet quality
Maybe I need a different windscreen?
update:
Today I mounted my tank bag, a Wolfman Expedition. In the past I have noticed that a tank bag disrupts the turbulence behind the wind screen. This helped a little, nowhere near as quite as a clean airstream. A slight improvement, as was lowering the wind screen from the high to the low position.