Have had a GT-Air for a few years and about 15k miles. You've got to have a Shoei-shaped head to enjoy this helmet, as opposed to, say, an Arai-shaped head like my wife's.
Can fog up in colder weather, and even on humid 50-degree days. Never went for the pinlock screen, and that might help. If you just crack the visor open or ride with the chin vent open the fog goes away, but then you get a stream of cool air on your forehead. Comfort is not too bad on hot days as long as you keep moving.
Since you're concerned about glare, Invision Speed Tint is recommended. Only problem is that it interferes with pinlock: you can't have both. I have the Tint and love it.
Been riding with full-face since 1973, and this is the best ever.
dirtup