A bonus perspective is to witness Winn's character and to debate whether she has grown, stayed the same, or deteriorated. Her genius performance is that subtle, and the story and direction so powerful that it will be interesting to hear how people's perspectives differ on this!
It's great to see how cinematic Shakespeare can be, and how stage-play adaptations have come since 1964's Becket. Polanski seems to have taken some notes from Pasolini's Edipo Re, and sadly possibly also from his personal tragedy.
The title translates from Deutsche to "Merchant of Four Seasons".