I binged through both House of Guinness and Black Rabbit this weekend.
They're both worth watching, but they're both flawed. Black Rabbit's two leads outperformed a script that had a few too many nonsense character decisions for me. I think they got 3.4 of the way there with some interesting story concepts that they could have explored, but cut some corners.
House of Guinness could have used some more star power, or something. I just didn't feel an attachment to the main characters as much as I should have. It's watchable, but it's not compelling in the way that Peaky Blinders was (another historical drama created by Steven Knight).