I think two topics are being discussed here at once but that is cool.

On the Band-in-a-Box samples per se, I have found some of them to be quite nice, and I use them all the time in either Sforzando or Aria to sketch things out. They are surprisingly good as freebies.

With regard to the real tracks, I don't think any composer in his or her right mind could not see the potential there and also not be flabbergasted. It is mind-boggling.