It's really a great idea. It's something I didn't know I wanted until I saw it. My (admittedly potentially naive view) is that it has the potential to simplify many things in the mapping/shipping world - it's so specific. No messy address ambiguity.
I also love the idea of an embeddable "Xaddress badge" (e.g. this image: http://bit.ly/2biI3YY) - unless of course I misunderstood what that is.
Maybe you could work the "legacy" address into that badge as well? Just thinking it would be useful for mentally placing an address - e.g., if you give me a raw GPS address, I have no idea where that is - but if you tell me it's somewhere on 5th avenue in manhattan, I know roughly where that is.
