So functionally it's roughly equivalent to a Gizmotron https://www.gizmotron.com/ with extra solenoids to push the wheels up and down. Actually the Gizmo is better in several respects: it doesn't block the fretboard (though it can be an obstacle for the picking/plucking hand), doesn't prevent string bending and by now seems to have a less staccato and less harsh-sounding string activation.