I finished it last weekend (took me two days).

It was ok (3/5).

I found the notion of 'act like Poirot' unsatisfactory. First, suppose someone has never read a Poirot novel or seen a Poirot movie. Second, their concept of 'act like Poirot" was consistently 'aim for the best short term result', usually attempt to extract the most information from the person being interviewed, which is, IMHO, not at all 'like Poirot'. I refused to play along and often chose the opposite of what they obviously wanted me to.

I found the puzzles (clock, phonograph, etc.) artificial and unnecessary. I got stuck once (clock).

I enjoyed the storytelling and the animation. The "grey cells" and "inspection" gameplay elements weren't too bad and quite original for this kind of game, I think. They were easy, but that's ok, for this way they didn't break the flow of the narrative.

I found Poirot's voice acting absolutely horrible. From the "behind the scenes", I gather that they employed a French actor who (so they thought) "knew English well". I beg to differ. His mispronunciation of many words and place names was grating. And every time he said "brain cells" instead of "grey cells", I gnashed my teeth.

I liked how they based a lot of their visuals on the David Suchet TV series, which it just so happens I had just ended watching in its entirety.

Still, despite my misgivings, there are a lot worse games around. So, all in all, I'm glad I played it.

My score: 464/600 ego points, 38/50 trophies

You had mentioned that there was something you had expected and was missing. What was that?