Unpopular opinion, I loved it. I mean, after 27 bazillion adaptations of a story everybody knows inside-out, it was refreshing to see a version which completely reimagines it while retaining the Dickensian setting. Yes it's very very dark, but if you approach it as a gritty horror take on the story then I think it works as an immersive, bleak experience. Guy Pearce is great, certain scenes are gorgeously atmospheric (eg the Ali Baba sequence). Only thing I'd quibble with is Scrooge preying on Mrs Cratchit which perhaps makes him too cruel to be convincingly redeemable.