When I used it, I could type in a 32 bar jazz tune in minutes chose one of maybe 50 to 100 styles to use at your fingertips.
Many features I don't know mostly for guitar I think.
My favorite feature is improvisation. There are so many artist styles in the solo section to choose from, Sax players, trombone players, clarinet, guitar for any style. You chose a soloist and if you don't like what it plays, go back to the solo box and pick another until you find one you like. Each time you go back it creates a new solo. If you like the solo you can save the tune(file) and it keeps that solo. You can save as many solos as you wish. You can play along, or print the solo out to catch the licks. If it is to fast you simply slow the tempo and it works great. Play it slow and keep practicing faster and faster. Some of the licks for a turnaround and also at the 4-bar point where you are transitioning to the 4 chord or the 2-minor chords I'm amazed at the licks that I have learned.
Some of the licks should turn you on and make you want to learn it. I started with BIAB in 2003 maybe and upgraded all the way to 2012 or so. It does everything I need with the pro version.
All of the other gadgets for me are not necessary. When I played my sax with the backing tracks people were listening to my sax. It worked great.
I can make it accent the 2nd and 4th beats at any turnaround with the Bass pedal like you hear on Jazz records and it gives me a little extra hmph getting into my solo.
You can also make the solo feature play four bars and you play the next four bars alternating for as many choruses as you'd like.
If this BIAB was around in the 50's, I'd be Dexter Gordon today. This is the best for those of you who are interested in Improvision.
_________________________
I'm not prejudiced, I hate everybody!! Ha ha! My Sister-In-Law had this tee shirt. She was a riot!!!