I liked it a lot - thought the linguistic concepts were solid and Mieville's usual surreal world-building was its usual mind-bending cacophony of weird - although in this book I found that the sheer quantity of weird distracted from the plot - which I think is the main weakness of the book. I felt the plot suffered at the hands of the world-building and overall concept of the book. Mieville was so focused on the Idea here that he didn't construct a super-solid "what happens." In addition, the main character - Avice - is just...kind of a cipher, and she never really solidifies. Still, a very worthwhile read, if not just for the intriguing linguistic concepts.