Slightly offtopic tangent: So by now we're all aware that these are already ubiquitous in Europe. The question I have is why it took so long to reach the US? Why didn't the main shipping companies there like FedEx and UPS step up and use their existing infrastructure to build something like this, much more easily than a startup could do.
In cities where people live mostly in suburbs, it is not quite so affordable to supply enough of these pack stations.