The Vello is indeed a nice looking bike, it follows somehow the Moulton bike philosophy.
But they could have further developed the folding mechanism. Once folded, it is for sure quite narrow (like the Strida) but rather long and I am not sure you want to take it in a bus during rush hour 
I would also like to see how it rolls once folded. It looks like you need to lift it by the saddle to prevent the chainstay to touch the ground.
But is the steer lockable? If not, then it will not roll easily by lifting the saddle.
What about the actual weight? It should be around 10 kg to be really competitive.