Hungarian history aside (and lets face it, for the sake of dramatic interest who amongst us aren't willing to put it aside) this is perhaps the best area sourcebook that white wolf have produced. For those who haven't read it, Transylvania by Night is not only an excellent resource for creating a Dark Ages chronicle, it is also the starting point for the popular Transylvania Chronicles series. This series is an epic journey through 800 years of history, and it all starts here.
In the book the locales are superbly described and given a breadth of feeling absent in many other sourcebooks. I particuly enjoyed the description of life in one city, where the hustle and bustle of everyday activity is counterpointed by the discovery of a dead prisoner in a pillory box.
There are also over thirty characters described, each one unique and by turns sympathetic and deplorable - yet all evoke some sort of emotional response. They are also all immiediately useable in your campaign, there is a notable absence of useless bit players that just take up space, a problem with some other sourcebooks. Downers? well some of the artwork is a bit ropey, but white wolf to tend to hang on to there bad'ens! Even this isn't too bad however as for a change the spectacularly awful John Cobb is given very little work to do. Perhaps they could give him a job, hanging around, drawing things, letting the other artists look at his work, therefore making them feel better in the knowledge that they could never be that bad. Also as usual the editing is not all that one would expect from a professional company, but then again thats also no surprise.
Overall The authors have provides us with a suitably vast, gothic, ancient and sublime vision, that any half decent storyteller will be able to turn into a fantastic and memorable game.