Personally I see a lot of problems with this design. Firstly you lose vision in one eye due to the eyepiece, or at least you’ll struggle to focus between that and the road. Then you have the iphone on your head scenario – it will be annoying if you need to change where you’re heading to, having to unclip it and then replace it each time. Not to mention, that it’s easy pickings for an opportunistic thief to grab it out of the helmet. A bit too much overdesign in my opinion.