In general I do not do audio books - my mind tends to wander and I often dislike the reader. However to me, Joan Hickson IS THE Miss Marple, much as David Suchet is Poirot. So listening to this, was like seeing her on the screen - I could happily envision the expressions on her face as she puzzled things out and questioned her suspects!
However I was also blown away by her reading of this - her speech only changed imperceptibly as she moved between characters, however you could always tell when she was speaking as Miss Marple. In terms of the stories, I am reasonably sure that I have read them at some point, but as ever I award top marks.