I think a lot of the awkwardness in the presentation and the other videos was partly due to the fact that there were cameras watching and it was a demonstration so they had to make the movements very obvious. This would perhaps have made the motions more exaggerated and unnatural looking. Think of that feeling you get when someone is watching you at the keyboard type or doing something that you would not normally think too hard about. The moment you start thinking about it is when you mess up.

I for one think that the interface looks very intuitive and quite easy to get to grips with. I think it should be more comfortable since you don't need to learn how to interact with the device. Holding and interacting with it should become quite a natural thing.