Completely unique style. What a cool way to tell a story from a first-person/third-person perspective! The characters are all wonderfully fleshed out, and none more so than Thomas Cromwell, the leading man. I don't know if I've ever seen a better role-model: wise, cunning, driven to provide the people with comfortable and just lives, free of the spiritual tyranny of the Catholic Church. Cromwell is a warrior for truth as well as an earthbound, ambitious, and caring human.
Mantel's story gives you all of the ambition and calculated ferocity we've seen applied to Cromwell elsewhere, but humanizes him in a powerful way that manages not to be apologetic for previous accounts. Fabulous book.