Having spent some time in the explorer section, what I see is something pretty, but unreadable. After the novelty of the interface choices fades, it's about as engaging as an XML document. There's no story here, no human element. I am seeing some interesting ideas and uses of space wasted displaying useless data. The experience is disjointed, the navigation is not intuitive, the page does weird things on scroll, and it doesn't work in IE11 (which is more offensive to me than it likely is to most of his audience - I switched to chrome to play with this).
If I were looking through this as a portfolio piece, I would be impressed with the technical elements of the design, a bit put-off by the usability problems, and confused (and a little upset) as to why a record of travel to 72 cities is presented in such a dehumanized manner.