I got the A bike delivered. tire pressure was crucial, when I first tried to ride it, the pressure was not high enough, and I could not get it to go at all. Pumped up tires, and put the seat way higher than the booklet recommended, and then I could get it to go (a little).
I can see the spring around the button on the crosspiece, which I think may be a flaw.
I sent an inquiry to the vendor, and am putting off taking it on the bus with me until I get a response from someone. Don't want to break it if it is not my fault.
I do have days when I ride light rail or bus most of the commute, so a mini folder will be helpful. I also feel somewhat trapped if I have to wait for bus with no bike backup... sometimes buses in Sacramento poot. I imagine this will not be my only foray into alternate bike shapes.