Disappointed that it wasn't an Ankh Morpork number (I was a little outraged to find it was set in London), and it took at least half of the book for me to be gripped by the story. It just didn't have the normal Pratchett zing. But by the last quarter I couldn't put it down and stayed up to finish it (worst habit). 
 Entertaining enough but a light read for Pratchett. I enjoyed Dodger as a character (shades of Moist von Lipwig, or any of the regular rascaly characters) but the setting wasn't that great. Wasn't overly fond of the historical figures either. 
 ...but if you like Pratchett, you'll probably just read it anyway.