I liked the idea of the half-bike and have owned and ride elliptigo arc and street striders, but this half-bike is just too small and requires more balance than I had expected.
I have issues with my feet being too long and hitting the back fenders unless I ride with pedals near back half of my feet. Also it is very difficult to keep it going straight in bike lanes on roads that have a grade towards the side or/even normal width sidewalks. Riding on a wide bike lane is ok, but I was hoping to use this to commute to work. It is also difficult to make sharp turns if you are going at a slow speed.
I think if it was a little longer and slightly wider it would have been much better for me.
It is fun to ride for short distance on wide bike paths, but not as useful as I had hoped.