Ok, no surprise to anyone: this is a really good book. Four authors who consistently produce high-quality stuff, all telling stories in a really neat world? Yep, that's a pretty guaranteed formula. I could find little quibbles with the stories if I tried, because that's the curse of being a writer or editor, but mostly I was just having a really good time and I kept trying to sneak away from my desk at work to read just a few more pages. I don't think I can pick a favorite; they all built off the framework in different directions, and while any one would have been a neat story, discovering the Irregulars' world through the multiple parts was extra satisfying. 
 ...and I really consistently love the approach Blind Eye takes to queer fiction; these are supernatural suspense/police procedural stories whose main characters are queer, rather than being stories about gay sex with some goblins tacked on. It's nice to see the way the elements balance.