First of all I want to say this book is exactly what I expected from it: More lore of the 13 clans. The setting is very important in WoD and as a storyteller this is a perfect supplement to get a better grasp on the tentions between the clans (something I use in almost every gamesession). The chapters are written from a in clan perspective what gives a immersed feeling when reading. Ill definitly let my players read their own clan chapter.
Furthermore I think the short explaination in the end for the Antitribu is very usefull if you have limited knowledge about the sabbat. The extra clan disiplines and merits/flaws are cool, but (for me at least) you should buy this for the stories, lore and cool fluff.
My final verdict: A must have for storytellers
[5 of 5 Stars!]