Dvd.box has compared InstantCopy version 7 and version 8. The bottom line: better image quality and shorter encoding time (but still very long). http://dvd.box.sk/articles12.php
Very interesting test. I've always liked the vid quality of InstantCopy 8, but most previous tests have always used ver. 7 (with a very good result). InstantCopy 8 is also more versatile than 7, allowing more manipulation of the various elements of the DVD.