I quite liked the first four issues of this, but the final flopped for me pretty dramatically. To be less polite: it felt like it spit in the face of fans of the series. 
 Overall, now that Jack of Fables is done, I can't say I was super thrilled with it. Without the Fables name, I probably wouldn't have finished it. I'm not convinced I would have even stuck through all of the original Jack stories, let along the Jack Frost junk that followed it.