Would you try another book from Agatha Christie and/or the narrators?
Yes. This is not her best work, and there is a reason why it is "lost."
Would you ever listen to anything by Agatha Christie again?
Absolutely. Her work is generally terrific, with the exception of these stories.
Did the narration match the pace of the story?
Yes.
You didn’t love this book... but did it have any redeeming qualities?
Her other works have plenty of redeeming qualities--this was more mediocre and I recommend her other works.
Any additional comments?
As I have noted, Agatha Christie stories are generally fantastic, but I believe there is a reason why these were "lost" or not well known. It is because they are not as good as her other works.