I really enjoy playing the ELZ-1's keyboard. The keys have a satisfying feel to them and are well designed. One feature that I think would improve the playing experience would be the ability to map different scales along the "white key" buttons to make playing the correct notes easier (similar to what Korg does with their Gadget app and Electribe instruments). This feature could be used in conjunction with the sequencer to create satisfying pieces of music more quickly and more easily. It would also aid in live and improvisational scenarios, or just jamming with friends! To me this concept sounds like a natural fit for the ELZ-1.