I love this piano; it's very similar to a Hohner Pianet, but with added tremolo/pan, plus the hardness & tone control.
The GUI is very basic, but eveything is obvious. I've never needed to look for a manual or customer support details, hence the halfway score. The same goes for presets: it's not an issue.
Referring to comments below, I've had no stability problems whatsoever, so I'd recommend trying it out for yourselves.
