Was in this purely because of Eva Green. I don't know the book and I have no intention of reading it now.
Even with only one episode left I couldn't bring myself to finish it. It was that awful for me. I lost interest around episode four, the fifth was just running in the background. I was so bored I didn't care. The concept for the story is supposedly interesting but if you can't keep people interested in what you're about to tell, that ultimately has to be considered a failure. What is descripted as "fateful coincidences" you can also call lazy writing. Let's be honest, those coincidences are rather unbelievable. Things happen because they have to or otherwise the story would be stuck in the mud. Maybe I'm lacking the imagination and I don't think I'm the audience for a novel written by a woman in her mid twenties. According to imdb highest rating comes from women 18-29 while lowest from men 45+. Go figure, we need demographics here, too.
It looks good, though. Costumes and sets, but that alone does not cut it. Eve Hewson has the charm of a tombstone. Eva Green does her usual best, the rest tries but ultimately there are to many characters to follow.
It's a love-it-or-hate-it show. But I read many comments by people who read the book and say it's bad.