Now I wonder, who on earth would think that? I've been playing Tyros 1, 2, and now Tyros 4, in live performance, for many years, and think the Tyros user friendly OS idea for this. Great sounds, styles, registration memory feature, and ease of navigation. On top of its user friendly Os navigation, Tyros 4's new improved vh2 and impressive live sounding drums plus impressively realistic SA voices make it a most terrrific arranger for my live performance needs.