I have been playing around with some simple tunes and I am loving what I can do with BIAB. The reason I went for the BIAB upgrade is I watched someone do Sultan's of Swing and the backing track done was really nice and with the proper lead lines and vocals. My expectations aren't for perfection just reasonably close. The other thing I noticed is the Real Tracks are really great. I got the standard upgrade but I went ahead and upgraded to the mega pak.....is it going to be painful to upgrade?