fwiw, I really liked the Half Continuum I tried at Discovery World in Milwaukee.
The playing surface is fantastic for melody lines with lots of glissando, and finger drumming.
Playing chords though in tune is an issue unless you turn on the “snap to grid” pitch option.
Also, while I don’t claim heavy investment in piano-style keyboards, being able to feel where the notes are, due to the black keys being a different height and arranged in particular patterns, makes a difference. You can’t really feel where the notes are on a Continuum - you have use your eyes to locate the black strips.