I've experimented with software arrangers (real and non-real time) and concluded for myself that it requires too much settings and preparations to be useful in live situations. I also preferred simple, minimum setups in gigs, less cables, built-in vocal processing/harmonizer, etc which the software arranger hardly provides. Currently I owned the latest vArranger (Dan, the developer doing a great job in perfecting this S.A.) in my opinion, the one of the most versatile software arranger available yet I still preferred the hardware arranger especially for spontaneous arrangements, recordings and simply playing for fun. Maybe I need to take another look on software arrangers and spend some more time working on it. Just my 2 cents.