I bought this reactive version of the Pinlock as I wanted to have a tinted visor in the bright sun, but also sometimes ride in the dark. This was the ideal compromise, without forking out for Arai's add on sunshade system. It works brilliantly. The reactive tint isn't instant, it takes around a minute to change, but fine for what I need. As an added bonus, the view through the tint looks awesome. Colours are more saturated and depth of field appears improved. Highly recommend and worth the money, especially with the discount from SportsBikeShop.