However, the GM sounds are pretty bad. I mean, stinky cheesy bad.

To get to the good stuff, you have to pick a GOOD virtual instrument (and assign the proper MIDI channel) for each active channel in your BiaB song. But so far, the sound quality on the non GM instruments is excellent, as good or better than any soft sample libraries that I currently use.

While it is usable with BiaB, you do need to know a bit about dealing with "virtual rack" gear and assigning MIDI channels, etc. If you have some experience with this sort of thing already, then this software is a piece of cake, but if you aren't comfortable with doing this, then fair warning: the Vi One is NOT good as a "plug and play" GM solution.