At first, I thought it was a good exercise (and it still is), but going through the result [0] made me more skeptical.
It is... slow? I mean, Internet Explorer slow. Maybe I'm spoiled by the level of responsiveness of application-style web interfaces, but opening an album or returning to the library feels slow. Is it because I'm browsing from Western Europe and the application is hosted in the USA?
I'm used to browsing multi-page apps that don't pretend to be apps, and having a 500ms load time after a click is expected and feels right. But waiting the same time for a click in a page that looks like an app makes me uncomfortable. It's weird - is this the Uncanny Valley again?