Not quite as good as Good Omens but definitely an enjoyable read. The world is fascinating, as a place that exists in the cracks of our own, embellishing on many of the mysteries people hold about the world, such as "What the hell is up with that 'No Passengers' train that comes across the subway sometimes?" and "Why does the coin machine keep taking my money?!" The characters, save the main character and possibly Door, are all engaging and delightful, especially the villain. The villains, Croup and Vandemar, were, by far, my absolute favorite thing about this book. I adored their voice, their mannerisms and their suave but evil atmosphere. It brought to mind The Gentleman from Buffy the Vampire Slayer, and I have no doubt Whedon was indeed inspired. The Marquis was also fabulous and a wonderful gray character. 
 The storyline... wasn't the best, but the characters were strong enough to make up for its floundering toward the end. As far as the main, Richard, who started out as one of the most painful characters to read, I will have to say that he ended up more engaging the main of American Gods, who I completely couldn't stand. Richard grew, though excruciatingly slowly, throughout the book and left his mark on several passages. While I never 100-percent sympathized with him, I did like that Gaiman presents him as the "everyday" man who reacts to bizarre things as most people would and just wants to go back to his normal life. Which, honestly, anyone else would want, despite being fascinated by the chaotic world of London Below. Door really could have used more development and was mostly presented as the "princess." 
 Overall, the story was fun, the characters even funner and the ending satisfying. I will add another nod toward Gaiman's prowess, although I contend his work remains very hit or miss for me. Any other Gaiman suggestions that might leave up to this one or Good Omens?