(No/Minimal Spoiler alert)
Kenneth Branagh as Hercule Poirot is nothing like the Hercule Poirot which Agatha Christie described, at least physically (egg shaped brain, tilted sideways). Yet he is suave, different and aesthetically pleasing to watch (what with the accurate description of the legendary eccentricity i.e, 'two oeufs', straightening the tie etc). Staying true to the original book-plot, an ensemble cast of who's who spread judiciously over the film ensures it's a treat to watch.
Unfortunate & unnecessary comparisons with book may belittle such a wonderful film, yet it deserves a respect for aesthetic authenticity. On the whole, a well done project and watch out for the witty intelligence of Branagh (Poirot), when he says "I'm at my happiest alone."
As a fan, I've left the theatre saying to myself in Poirot's true style - 'Mais, Oui...More films, please. Merci'.
Film - 'Murder on the Orient Express' (2017 by Michael Green)
Link - https://en.wikipedia.org/wiki/Murder_on_the_Orient_Express_(2017_film
http://www.imdb.com/title/tt3402236/