I have bought an imitation a-bike. Why not real? Too expensive. It would cost me total ~570$ with delivery and customs+VAT fees.
What happened. The nipple from the tube moved a bit from whell protected area and caught the rear crank case. So nipple was cut from the tube.
In general imitation made with rather good quality. Only saddle material is so soft that scratched by pedals when folded. Chain, sprocket and bearings look strong.
The only thing that make me worry (even for the real a-bike) its how the Rear Lower Tube attached to the Crank Case. It seems not to be very reliable.
P.S. 2 Admins, how to activate my username? (without the last underscore)