BFold of New York City let me test ride one a while ago(2 years?).
Handling takes a bit to get used to; even by folding bike standards.
Geometry is really weird. One advantage is you can remain seated when coming to a stop;
red lights, stop signs, etc. And the umbrella fold might work better for some than the box
fold(Brompton, Birdy, etc.).
Another bike with an umbrella style fold is the Pacific CarryMe. This bike has smaller wheels;
but the geometry seems to work.