Ok. I toftt-ed! Here're my impressions after some tries with it. The interface is easy and there are many predefined texts and images I'm not sure whether the accellerometer is used at all. The "pixels" occure in my initial tests rather late. The reader of the messages has to be rather away to see the messages. The letters are as high as the iPhone. I'm not entirely sure whether its possible to read the messages without a camera. I'll have to do some further tests.
