Yes, there was some really, really bad acting in this film, but it wasn't done by Koo Stark. She was beautiful, demure, and a pretty decent Justine. (It's often hard to judge an actor in a really bad movie.) i have never seen Stark elsewhere, and would need to do so before deciding if she were a hack. About the material itself, I have read some Sade, (although not "Justine") and it is some really vile stuff. Someone mentioned that the sex scenes were depressing and un-erotic. That describes Sade's stuff on a very mild day. He was a fanatical atheist, and took great delight in portraying sex as sacrilege, and all religion as hypocritical.