Oh dear, where do I begin? If there ever was a more perfect story of a revenge, it has yet to be written.
The patience, the way the count gets himself into the web of history and lives of the ones he seeks. The way he reveals himself to each of his enemies is a grand event, each time.
What I also liked was that not everything happens as intended, nor does everything happen the way the reader would wish it. To me this strengthens the story, gives it a real feeling.

The only thing that bothers me a little bit is that the Count sees himself as an instrument of God, while it is so clear that he seeks his own revenge. It's a very personal vendetta, but he struggles to find the fairness in it all if the actions are just his alone. It is natural to seek a way to confirm actions, but he seems like such a wise and strong person that this Godly mission point feel like a weakness. However, I forgive this minor irritation in consideration of the time the book was written.