I do think these might have some real benefits in specific situations, though for the generalists I'm going to start by saying they're not something I'd recommend...
From the outside, unless you have the light at the right angle, you'd be hard-pressed to notice that the Engo 2 isn't a normal pair of cycling glasses...For a frameless pair, they are actually pretty stiff, on a similar level to the Oakley Encoder, but ever so slightly taller...
Atop and beside the bridge of your nose is the beating heart of these glasses. Moving from left to right as you look out you have the battery pack, the largest protuberance of the lot, then in the centre, you have the on/off button above the magnetic charging port...To the right is the actual head-up display, which fires the display upwards towards an angled mirror, which then in turn projects the image...
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