I've noticed a number of reviewers having difficulty with this film on grounds of its historical inaccuracy. I can't speak to any of that. Being myself blissfully ignorant of the relevant history, I was untroubled by such considerations as I settled into my seat at my local Picture House - perfectly happy to take it as Art: a work of speculative fiction, and a somewhat impressionistic one at that.
Treating it as such, I found it thoroughly engrossing: 1hr 54 well spent, IMO. The central performance by Vicky Krieps is wholly engaging and deliciously subtle, and its portrayal of an intelligent, creative spirit struggling to maintain sanity against a straitjacket (or should that be corset? That's the big metaphor, after all) of patriarchal social convention had me hook, line and sinker, from the opening scene to the (breathtakingly unexpected) final one.
In the interests of full disclosure might as well mention the two things I was less keen on. Neither of them deal-breakers, but...
1) In a couple of scenes, characters are heard singing late 20th century pop songs. This practice of inserting anachronistic modern detail into period drama has become a bit of a fad in the last few years, especially, it seems, in German productions (the recent TV series KaDeWe springs to mind as a prime example). My personal feeling is that it's a stylistic quirk that's been done to death and has outlived its welcome. Others may disagree!
2) One part of the story (we are told by the onscreen captions) takes place in "Northamptonshire". Yeah right. Northamptonshire my ***! Neither the architecture nor the scenery are remotely British. It's blatantly obvious that these scenes were shot, like the rest of the movie, in mainland Europe - most likely southern Germany or Austria. Perhaps the production budget wouldn't stretch to a trip across the channel? Ah well...
These minor niggles aside, though, I'm glad I went to see this movie. Its imagery will linger in my consciousness a long time. If you're debating whether or not to buy that ticket, I'd say go for it. :)