Gary.....honestly you select a style.....and thru your chord changes the AUTOMATIC accompaniment plays the style which in reality is a midi file .....in no way are you playing the base line, or any other parts in the style manually the computer inside the unit is driving it under your control no more no less..I repeat the PARTS ACCOMPANIMENT being played are AUTOMATICALLY playing because of the chords it recognizes....I would give more credit to someone who multi-tracks a sequence SMF tracks by track vs playing a premade style.
They all sound good .....just a different way of operating the finished result, now the right hand is a different story.....I like them all and use them to their fullest on stage.
And sing also.