The time it took the gentleman to explain the chord progressions that he was going to play I could've played them in my arranger . If you are so musically minded that you know what a chord will sound like in a progression before playing it then band in a box might be an advantage . But if like most musicians, you like to hear what something will sound like and experiment with progressions before you know whether you like it or not ,this just sounds really awkward both as a performance and songwriting tool to my mind . it' no easier to use than an arranger and if you wish to change chords within a bar and not squarely on the beat or just off the beat how easy is it to conceptualise this and input correctly in Band In a box in as opposed to actually playing it ?

Don't get me wrong I'm sure someone can find a use for this but for me it's superfluous to my arranger