I have the second pair you listed, and find them terribly uncomfortable to wear for more than a half an hour or so. I've tried stretching them on a medium-sized cardboard box but didn't notice much improvement. They make my head feel like it is being crushed, and give me a terrible headache rather quickly. They crush my ears into my skull too. The noise canceling and battery life on them are great, but if you considering purchasing these and have a slightly larger-than-average sized head, this is something you should consider.
I'm getting a 400 error when I try to complete the 'choose a username' screen.
No visible reaction to pushing the continue button at all, but the error shows up in chrome's console.
"Uncaught SyntaxError: Unexpected token O"
Chrome 25 on windows 7.
I just tried again from scratch, without going through the google oAuth page, and its worked this way. No idea what went wrong the first time around.
Hardest and most rewarding was all the serious engineering we did to make the app and gestures fun and fast. Most of the components in the app are custom, from the navigation controller to the story menu down to the scroll physics. Aria just answered this Quora question that goes into some of the details.