First the technical side- this 6 CD set is not a normally pressed audio CD set, rather it is made up of CD-R's, which have a lesser lifespan and are more subject to thermal damage. This is not advised to you here on Amazon nor on the outer cover. Inside the box we find that the publisher guarantees the disks for just six months. If they are unreadable after 6 months... and you will probably expect a normal CD to last much longer. The disk data track identifies them as Japanese A+ grade, which means that immediately after manufacture there were almost no flaws on them. A few CD players do not appreciate CD-Rs - some top opening radio/CD players can become very hot and hostile to CD-Rs.
Then the reading- competent and clear, not too hurried. If you have already read the book, chances are you visualised the characters differently and this may affect your enjoyment, but so it goes with all audio books.
The story- this is the prequel to the story "The Box of Delights", also available from this publisher on audio CD-R. The Box of Delights has been dramatised on radio many times and the 1995 version is available from the BBC. The 1984 tv show version (somewhat abridged from the book) is on DVD and a new film version may appear any time soon. The prose style and the situation of both books are now a little dated and maybe some scenes even cliched, it was written some time ago. This is a classic tale with magic, perhaps along the lines of Nesbitt, possibly for a slightly older audience, the tension and danger run a little higher. Good reading for anyone not put off by paragraphs running over several lines and fairly lengthy monologues.
One version of this book at least should be read before moving on to any version of The Box of Delights, as some useful background is given to the repeated characters.