1. Good but...
Airflow is good, aerodynamics are good. After a thousand miles it fit my head well enough. I wear glasses and it took a few rides to find the sweet spot for them. It's nice and light too. The pinlock does OK in a driving rainstorm to keep you fog free but it's not perfect by any means and I'm not sure if it's better than a regular visor. Now the downside, I dropped it off my bike in a parking lot and the internal sun visor mechanism broke! Since the mechanism is housed inside the impact liner it can't be repaired. My $450 helmet has a broken internal sun visor now because of a 4-foot drop! Kind of lame. I had to buy a sun shield because of that. That's the only reason it gets 3 stars instead of 5.