I finished it last month, but also enjoyed it. It's totally not like the normal sort of fantasy books I read, but it kept me interested for sure and it was nice to have a change. 
I finished early this month, and I agree, it is not a normal fantasy book, at least not one that I would read. It held my interest, for sure. Geesh, the amount of violence was shocking for me because I am just not use to reading books with violence as written in this one. This book is dark, and very gritty. The storyline really did keep me on the edge of my seat, and with that said, I worried about Locke. I really did not think he would make it out of this story alive, but at the same time, was not surprised to see that he did. The setting was a bit difficulty for me to grasp at times. I get it that the world has many structures made of glass so it seemed a bit futuristic in that sense. However, the way the characters operated made it seem like that they were living a very gritty life that does not blend well with glass. Do you sort of know what I mean?
I cannot make up my mind if I like Locke or not. Actually, I cannot make up my mind if I like any of the characters. Although, Chains is one character that comes the closest for me to say that I like without much hesitation. When I say like, I mean that the qualities of the character have some good. Otherwise, I do think the characters were well written.
What was his name? I must know.
I liked the book in general, some bits better than others. I wasn't expecting Calo and Galdo to be killed off quite so ... unceremoniously. The Falconer seemed a little too powerful to be realistic - Why would someone so capable need/allow themselves to be hired, even for an incredible amount?
I liked the idea that the city was built on something much older - the Elderglass being all that was left.
I was very much amused by the idea that Locke really was a priest.
Wraithstone is fantastically horrible - and more so the word Gentled. Such an innocent word for such horror.
There were an awful lot of characters in this book, and I liked that they were distinguishable and not too flat. The story was complex and I feel like it should have been terribly confusing, but it wasn't.
Also, I still want to know his real name...
I am also curious as to what his first name is, and I am amazed that a young child (he was 5 when taken in my the Thiefmaker, right?) would have the forethought to use a name that is not his own.
I was surprised by the deaths of Calo and Galdo; the way it occurred. I actually suspected that Jean at one point as maybe being a traitor to the Gentleman Bastards.
I too was also curious about why the Falconer, being as powerful as he is, would consent to be a hired hand. Although, I do wonder if that has something to do with society rules that were put into place in regards to not being able to kill those like Falconer.