They are very awesome. I only recently discovered other helmet brands have them too. Being a devout shoei fan I thought it was an in-house shoei thing. But unlock is a seperate company that sells to other manufacturers.
Never mind eideforever courses ACC should offer discount if you commute regularly and have unlock visor in winter.
Just one tip. If you ever remove for cleaning make sure it is fastidiously dry before reinstalling. Just a couple of trapped droplets will mist between the layers from the radiant heat off your face about a kilometre or so after leaving homes d its trapped till you wipe it out.
Every great cause begins as a movement, becomes a business, and eventually degenerates into a racket - Eric Hoffer
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