Just got my copy on the day after Christmas, and I have to say that I'm deeply impressed! After the debacle of HoL and CoD, and the vague mediocrity of VRGttWD, I had begun to fear that only the Gazetteers would be truly outstanding. I was obviously incorrect! This book especially pleases me because I have a specific use for it in my current campaign.
One of my players is a Russian-speaker who fell very much in love with the whole steppelands/Russian plains feel of Nova Vaasa when I was talking to her about the Ravenloft setting. Her character concept was that she wanted to be the bastard daughter of a prominent nobleman, semi-acknowledged but not entitled to any inheritance, so she would be given pretty much a free hand in her own life. After describing the various noble houses of Nova Vaasa, from the previously established material, she came to the conclusion that she wanted her character to have a strong sense of justice, as well as a love of the common folk, so she picked the Hiregaards. I then mentioned (knowing that she knows virtually nothing about Ravenloft) that the house patriarch, Tristan, is a known womanizer, though otherwise considered an honorable man, and has a long-standing rivalry with a serial killer known as Malken, a fiend that has a habit of killing Tristan's lovers. She took to it immediately, even working her mother's death at Malken's hands into her backstory. Also, she decided that while she was present for the murder, she remembers nothing about it, not even the face of the man that killed her mother.
Her character is an aristocrat/ranger, with a plains cat as an animal companion. I think that when the truth finally comes out (as I plan to happen soon) the delicious irony of Malken's symbol being the plains cat and her own fascination with them may cause the
player to have a fit.

I've also personally decided that she's going to start having flashbacks to her mother's death pretty soon, and that the reason she can't remember anything of it is because she recognized the killer as her beloved father and couldn't cope with it.
Legacy of the Blood was very useful for me (since we're on a hiatus for the holidays) to help get a better feel of what life inside the Hiregaard family is like, especially for bastard children. What I find amazing is how close the book's conception of the family's stance on such things was to my own! (Great minds think alike, eh?

)
There's another of my players who may be related to one of the families in the book as well, but I haven't actually decided if I want to use the plotline or not. The character is an ethnic Gundarakite, but he's tall, blond, and blue-eyed, and part of his backstory is that he never knew his father, and his mother refuses to speak of him. The only legacy he has of the man is his name, Engels. The name is fairly obviously Falkovnian (German), so of course I'm considering his possibly being a Drakov child or grandchild. Even if not, I've decided that his father was Falkovnian, if only because of the facts listed before. At the very least, it would be interesting to see how he copes with it, considering how much the character hates Falkovnians. (Not because they did anything bad to him... he's just bigoted.)
Legacy of the Blood is useful to me in a general sense as well, because three of the six characters in my party are known to be noble-born, so it's nice to see how the
noblesse oblige mentality works in Ravenloft in greater detail. I also love the PrCs (especially Raptor Knight - holy crap!), and many of the feats are exceptionally good. I've also been waiting to see a "mad science" system for a while, and I have to admit that I really like this one; it doesn't add any new rules, only ways to interpret those rules in a different milieu, which I very much appreciate.
All in all, I think that LotB is truly magnificent, and I look forward to a possible follow-up book or books!
Hida Jiremi
(Jeremy Puckett)