My 'brother in law' have used BIAB for years, updated every year and has all addons.
He simply loves it, and use it to 'compose' backingtracks for himself and others. (He is a pretty good singer).
The software is amazing, audiotracks and styles has grown to be really good stuff.
Myself, I have been fooling around a bit with it, but 'till now, I'm more pleased by sit down and play by the keys,
rather than write chords and do all at the PC before press play....