Yamaha reface CP Electric Piano
reface CP puts a van full of iconic 70s stage keyboards and vintage effects into a portable retro-styled package without sacrificing sound, playability or polyphony.
This board would get fives stars were it to have USB power. However, when using as a MIDI controller, it must be plugged into the wall or full of batteries. The Reface is therefore pretty useless for anything outside of playing back the admittedly high quality onboard sounds. This seems like the sort of deficit that results less from any genuine difficulty, and more from thoughtlessness.