I rode a Tour Easy before my knees finally gave out. But that Vetter thing looks downright dangerous. It would be awkward and clumsy around town, and who knows what kind of effect wind gusts or a passing 18 wheeler would have on it out on the road. Looks very top heavy and unstable.
2002 Vulcan 750, 2001 XT225
2008 Vino 125, 2009 Genuine Stella
2012 Zuma 125, 1980 Puch Newport moped