I picked up a copy of Karen Memory when it came out last year, and thanks to trying to finish up a reading challenge, I finally took it off the shelf and read it. What fun! 
 Karen's voice is distinctive -- maybe a little jarring at first, getting used to her grammar and word usage (especially "of" instead of "have", as in "would of"..., etc). The first-person narrative by Karen adds a Western grittiness to the tale that really adds a lot in terms of flavor and setting. 
 The steampunk elements are enjoyable. I tend not to enjoy steampunk that gets so involved in the description of gears and pistons and steam engines that plot and character suffer. This is not the case in Karen Memory. The gadgets and gizmos serve the story, not the other way around. 
 The plot is engaging and exciting, as Karen takes on the bad guys, backed up by the do-gooder US Marshall, his Comanche partner, and the women of Madame Damnable's. While I wished that some of the supporting characters were a bit more developed (it was hard to get a feel for several of the working girls as distinct people), overall the cast of characters is diverse, flavorful, and quite entertaining. 
 All in all, Karen Memory is a quirky, unusual romp of a read.