I don't want to go into my reasons for why I don't play Ketron products again - it's in the archives somewhere, and it seems like so long ago that I just can't put all the thoughts together at this time. I DO remember that it was mainly the operating system, and NOT the sounds or styles. Polyphony was a problem for me too - I lay on the sustain and play big fat chords, and it coughed too much, and screwed up the harmonizer when the limit was reached. Too weird for me. Sounds were good thgough.