I don't often go for steampunk, but I do enjoy it when done well which this book most definitely does.  With vivid imagery and characterization it is a joy to read.  It also does a wonderful job of subtly interjecting the Otherworld into the more mundane steampunk setting, and a grand job of presenting the magic of the Fae in the manner I most often think of it -both grandiose and subtle at the same time.  I only wish that I had the finished book in my hands right now.