This was my first Neil Gaiman book. I can understand why people love his books.
This reads a lot like Harry Potter in terms of the fantasy right under people's nose, and the fact that this happened in London (what is it with London and trains, eh?) gave further familiar vibe.
The book has a good flow. It's well written, with skills and thoughts. Gaiman created a whole world in 350 pages, and it feels like there's much more in the brains this came out of. I like how this books is kind of happy ending, yet, still not, yet... is... if you read it, you'll get it.
I don't usually read fantasy like this, but I'm glad I picked this up. It was a fun read, an entertaining one, an invitation to provoke the mind and imagination.