One thing about the UI that I find irritating (and this is mainly because I am an N9 user, is the swiping from the side when the home screen appears. I do this instinctively to get to the feeds screen, but of course it is not there. All I get is at ambiences screen. How often do you change the ambience? For what is such an easy motion to make single handed (far easier than swiping up from the bottom of the screen) why assign such a dull option. I think the notification screen (when and if it ever become useful) would be better served with a side swipe. (excuse the pun).