Well I've just watched it and I've just read the one review which slams it. So I'm here to balance this up.
I could only find a copy with abysmal english subtitles which is usually a huge turn-off for me. On this occasion I literally turned them off with no ill effect to my enjoyment The only time the subs made sense anyway was in a market scene when a man was holding up rabbits "Buy my rabbits buy my rabbits" it accurately said along the bottom. Anyway I can't imagine the dialogue was exactly Shakespeare - but more importantly the visuals were compelling enough to tell this fable.
It's based on an old folk-tale - but 1970-ed-up. A girl runs away from home and hooks up with a a travelling player who turns out to be a bad 'un. In fact he's very bad. He's the Devil. Enroute to redemption she encounters a full Breugel/Bosch nightmare vision of the medieval low countries. Dwarfs, deformed cripples, burning witches, boils on boils on deformed faces, rats, plague, a grotesque orgy scene. and monks scattering straw over the cobbles to hide the blood from an impaled peeping tom. Come on what's not to like?
If you like "The Devils" and "Valerie and her Week of Wonders" track it down.