I've had no problems playing styles or midi playback.
You can easily mute, change volume or sounds in Styles, either globally or per variation, then save the changes.
Intros, variations, fills, breaks, all work fine.
There are still some issues with audio guitar parts when playing aug and dim chords, but in real-time play it's hard to hear. If you were soloing the style part, it's not hard to hear.
Not a killer thing for me, but I will be glad when they fix it. I'm told they are working on it.
I will be taking it to work tonight for the first time, that is if I can get my son to load it in the car. My back went out last night. (Well it WAS my anniversary).
You know you're getting old when your back goes out while the rest of you stays home.
DonM