It looks like a very tidy design, with a 1+2 seating arrangement where the passengers sit behind the driver, who is front and center. But the ergonomics look very tricky--to get those 2nd row passengers in their seats, they have to climb over (I assume) a folded forward drivers seat, after negotiation the forward tilting cab.
Unless the rear of the cab opens as well? It is hard to tell from the press photos.
Even if the rear cabin opens, I don't think a forward opening door will be well received. If it is raining, you (and our seat) are getting wet while you work on getting in or out. If you are in a front end accident, it seems like it would be harder to open the door, if the hinge was crushed.
The half-windows are also not going to go over well, although perhaps in the U.K fast food drive-through is not as common as in the U.S.