During RETechSouth, we were doing a TON of demos on both my laptop/big monitor and my new iMac, which was a business Christmas present.  I've got the wireless Magic Mouse and tiny wireless keyboard.  Toward the end of the day Thursday, a message popped up saying the mouse's battery was low.  Up until that moment, it had not even occurred to me how the mouse was powered.  The process of setting up the computer back in December had not highlighted it.  But of course, it was as simple as flipping the mouse over, popping in two new AA batteries, and going back to work.

That is the type of design I've been striving for - unobtrusive.  Of course it works - why wouldn't it?  How does it work? Automagically.  Pay no attention to the man behind the curtain?  No, that's obtrusive.  It's really more like "What curtain?"

Another little lesson learned in generating magical user experiences.