Estate planning lawyer and mom to two boys. My older son liked audiobooks as an infant, and I've listened to a lot since then.
My 11 year old loved the humor and fast pace of this book. Johnny Heller's narration was his usual outstanding work; he's well-suited to funny books.
As the parent, I found this an enjoyable listen, but not as compelling as some -- certainly not one I would have finished on my own.
I would not recommend this for a particularly young and sensitive or squeamish child. Although there was nothing problematic for us, my son delighted in telling people that Goldilocks was impaled on a church steeple, or some such. In another episode, parents sacrifice their children. One of the recurring themes was how adults -- and especially parents -- are useless at best, and are usually harmful to their children. Although this is a common theme in children's literature (are there any children's books with good and present parents?) the direct and repeated statement of this proposition would make me shy away from it for a little one, especially coupled with the occasional gore.
My then 12 year old just adored this series. He devoured it and would stay up late at night listening. I would highly recommend this series for anyone in his age range. Especially if the child likes updated versions of fairy tales.