I would feel scared in it on the streets due to low height - rinding a bicycle is fun, efficient but a tad risky; but riding a recumbent or this one feels like a deathwish since a SUV or truck wouldn't notice a 90cm high vehicle right in front of them, it would be obscured behind car front hood.
I see quite a lot of these vehicles in fly by on the dutch roads, they use the road and not the bicycle lane. They are becoming quite popular. Luckely we don't have that many "tractors" as we call the big SUV's. Drivers already have to mind the bicyclists so the velocycles are just another road user.
When i'm on my racing bike i can barely keep up with the non electric velocycles, often driven by 40 year old or so professionals commuting. They are incredibly fast for little energy expended.
