Another really nice feature is the sequenser control track.
We never used midi or backingtracks, but when we rehearsed before gigs, I sometimes used the control track to record all shifts in variations, fills and endings etc. and saved with the style.
That way it was more relaxing, hands was free to play, not push buttons.
Whether it was a good atmosphere and it might be okay to continue with an extra chorus or something, it was just to turn off the control track and continue as if nothing had happened.