How bad is it? It has some very silly fight and sex scenes (which overlap).
Should you see it? It's only on VHS, so hard to find, but it's an okay watch.
This was advertised as a Grace Jones film, but she's not the one doing the titular vengeance. She does do a prolonged sex scene prominently featuring her butt. There's horrendous music, weird editing, tacky fashions and a climactic castration. The fight scenes are deliriously silly.