The information was displayed and curated extremely well and the UI was perfect to me. Like reading a book: nothing to mess around with, just turn the pages.

On some browsers was it messy? That's web dev y'all. We always assume everything large companies publish will be perfect and cross-everything optimized, but being big doesn't mean the process for creating creative work is any different.

Fine with the bitching, good to see the issues people have (best kind of education) but can't we all at least be happy with having all these great statistics in one highly credible place?

It's not simple, it's so absurdly overcomplicated and obsessed with one of many possible renderings that they've made the content inaccessible to most browsers we've ever had, apparently including the default browser on most Android phones (ICS didn't bundle Chrome). Their own search engine can't preview or cache it properly. They should regard widespread authoring like this as an existential threat to the web of openly interoperable hypertext and discourage it however they can.

It's beautiful but I can't stand the page transition animation. It's too slow to the point of annoying - I had to force my eyes to look away from the transition, away from the screen, as otherwise my eyes would try to focus on the blurry moving text which 1) hurts my brain to focus at, 2) disrupts my train of thought as it disturbs my focus (both mentally and physically).

How I wish that tablets provides a way to do the same thing that page up/page down does with just a tap. I found swiping up/down for jumping to the next/previous page distracting for exactly the reason I stated above that I put a bookmarklet on my tablet browser to do the page up/page down when I single tap on a non-html-linkified entity.