I bought a PSS-A50 last month to take to school to jam with my students (I'm a music teacher). It's light, cheap, runs off a phone battery, includes a looper, small speaker, cool retro midi tones. I've been totally addicted to this little keyboard. I'm really happy that the Keen on Keys YouTube review convinced me to impulse buy.
It's really incredible how far you can go with the little instrument and I think this album demonstrates it. Thanks for making this rad album!!