Not sure if it's just my disc, but my Z Avenger SS never seems to come back. Put a little anhyzer on it and it just glides, turns hard, then turns over and dies. I can't get great distance with it, but it's been a great stand-in since I have no sidearm.
if you look at all the posts, I dont htink it is the disc as much as it is the arm that is throwing it. I know some are more overstable or understable, but really, I think it depends on how it is throwm and arm speed.