Ideal bed time reading - the stories are written well enough to draw you in, but are short and formulaic enough to not keep you up all night guessing what happened next.
Some of the stories are more obvious than others. Unlike in the The Thirteen Problems, there is no particular thread to collection - and no story line within the collection to reveal more about Miss Marple (or why the collection is titled Final Cases).
For that, 3 stars, not more.
I guess, if Christie had been alive and able to have an input in the editing and collating of the stories it might have turned out better, but this was published to provide a final fix for Marple enthusiasts.
So, if you are considering picking up a Marple story for the first time, don't start with this one.