well, I have only scratched the surface of BIAB and I discover something new and delightful almost every time I use it. Here are some of the ways I use it,

1) as a songwriting aid - experiment with a verity of chord progressions in a variety of styles and see if anything strikes me. I often come up with a basic structure for my song and render it to an mp3 to listen to in the car and I begin to sing along and find lyrics that way.

2) as the most advanced metronome/click track ever - In order to have my tracks all line up I tried using a click track and a metronome and was always put off by both. Hard to feel inspired by a clicking sound. But now I go into BIAB and pick a style roughly similar to where I want the final song to be and render that to use as my "click track". Amazing how much easier it is to lay down my vocals and other tracks with a full band in my ear!

3) as a backup band for practice - I'll pick a groove I want and drop some chords in there and render that to use as a backing track for practice. As I speed up I can increase the speed of the track. If I wanna change keys BIAB does that easily too.

4) as studio musicians for some of my demos - sometimes I find a complete style that needs nothing else from me other than my vocals. It isso delightful to have a bluegrass song in mind, go to BIAB and find exactly the "band" you need, record your vocals, mix it up and bang...you have a song! Or, maybe all your need is drums and bass...you'll find them in BIAB. I know there are guys here who always roll their own and don't use styles and I expect to be doing that some day as well.

Basically the tool is unlimited! Now, with that said I did purchase the package that has all the RealTracks. I am not into midi at all so I do not think I would be satisfied with BIAB without the RealTracks.