Hi Dan: I use and find the onboard sequencer on the Yamaha Tyos (and formerly on the PSr2000) convenient when I want to record an auto accompaiment/keyboard performance from begining to end, in one take, I rarely (if ever) use the keyboard's on board sequencer for post editing, other than editing an isolated note. I also rarely ever attempt to quantize the live performed parts because this seems to always result in removing the spontaneous magic of the original kebyoard performance. One nice advantage of the Yamaha sequencer's onboard sequencer is that it also saves the auto accomp chords with the song, so the chords can be displayed & send to the harmonizer on playback as well, convenient if you want to record (or re-record) your vocal track (with harmonies) later. - Scott