Oh, and don't forget to take advantage of the Dynamic Arranger feature. This way, as you play louder or softer, the style parts will also get a bit louder or softer. Great with those vel-switched drumkits! There is an edit page (it gets saved to the User Program) so if the rise and fall is more or less than you want, you can adjust it here.

One of the quite astonishing things the Roland's can do is trigger the style from full PianoStyle mode, Bass inversion on, Dynamic arranger on, D-Beam set to turn the ACC Parts on and off (and you permanently mute out the style's piano part/s) and you can get a quite scarily accurate band backing that follows YOUR inversions, YOUR dynamics, and goes from Drums and Bass to fuller accompaniment at your whim. Done well, it is quite amazing.

As you get used to having to HAVE to play three notes before you get a new chord, if you practice playing solos VERY carefully so you only ever hold two notes at a time, the accompaniment can stay on one chord and you can play some quite interesting outside stuff without the chord recognition freaking out.

There's a fairly detailed article I wrote at the Roland-arranger.com website that goes into this in more detail.