Rating scale: 5=Loved it, 4=Liked it, 3=Ok, 2=Disappointed, 1=Hated it. I look for well developed characters, compelling stories.
As you read through reviews for this offering, you'll see that those who already know and love the story through the full book version also enjoyed this dramatisation. I am one of these. But if you have never read or listened to the full book, it would be very hard to understand what's going on as the audioplay is essentially an abridgement of the story, losing a great deal of the character and plot development. That's the reason for the 3 star story mark - it just doesn't stand alone for the uninitiated. This really is a story that deserves a complete hearing. The voice actors are superb, especially McAvoy and Cumberbatch, but I did drop one performance star for the somewhat scratchy quality of the sound effects.
Neverwhere (the book) was my very first Gaiman experience, and it got me hooked. If you are at all intrigued by the story premise, do yourself a favor and go to the source. Gaiman reads the entire story himself and does his usual remarkable job.