I tried one out a couple of days ago at the Kraft music show room which is in my neck of the woods. I didn't like it much at all thinking it would take a long time to get used to it .
The keys or what takes the place of keys are very narrow. I did kind of like the feel other than them being so narrow and also the color differences between black-and-white is very subtle. I figured Stevie Wonder would love this keyboard but me not so much.