We saw the first episode of this at the BFI Southbank, where a Q&A after with Sarah Phelps, John Malkovich and Tara Fitzgerald talked about this new and different adaptation of Poirot.
Phelps' Christie versions have been hit or miss for me, but this is not without interest, even if making Poirot a refugee with a past as a priest of all things is a little bizarre and heavy-handed.
Malkovich makes an intriguing Hercule, and I'd like to see more of him in the role, but I didn't like Rupert Grint's sniffy Inspector and some of the changes to the character of the salesman ABC himself seemed to be done purely for titillating reasons.
Shirley Henderson as the doss-house landlady was good value, though, and the mystery panned out with enough going on in the sidelines to keep it from going stale.