One of the things I like is the unique format: No section is more than 3 pages and many are just one page. And it's cross referenced. At the end of each tiny section there are links to other similar axioms. I easily found myself hopping around the book. You could say it's a post-modern format---don't have to read it beginning to end, hop around to your own liking.
I won't be surprised if this becomes a leadership classic, and maybe Bill Hybels' best book to date.