I loved it
I've seen the Billy Wilder film, which I also love but for different reasons.
This was dark, grimy and claustrophobic, feeling the effects of the WW1, and the damaged caused to everyone.
It was smoggy and Toby Jones' character was battling through the claustrophobia of grief, loneliness and an oppressive serious illness (with out knowing it at the time).
He was the prefect patsy really, desperate to succeed, somewhere in his life.
I thought all the acting was first class, the writing was excellent, and I loved the sepia & smoggy cinematography.
It was very atmospheric, dark, and showed off Agatha's magic perfectly.
I don't understand the bad reviews, I can only think people were expecting more of a 'cosy crime' story.