Watched this last night with my wife. I am not a big fan of Agatha Christie, but I enjoyed this more than Death On The Nile. While that film started better, this was more of a slow burn. I worked out who it was, almost for the right reason. I doubt that I would watch it again, but apparently others have enjoyed it much more than I.
There has been outrage though about the BBC adaptation of another Agatha Christie novel because the work of fiction was altered slightly to be more inclusive of the population demographics of today. Due to this, I may take the time needed to watch Murder Is Easy, which I doubt I would have watched otherwise.