I like this product because it gave me a lot of 'food for thought', I run a sporadic DnD campaign that doesn't allow Players to take exotic races until they have actually been encountered as friends, foes or neutral.
I know that most of my Players have access to the standard AD&D and DnD info on the Drow but they don't have access to this book so far. For me this means that encounters with Drow can include Prestige Classes and magics etc. that they have no knowledge of, so rather than worshipping Drizzt and all his little Drow friends, the Players might actually start to fear them again.
[4 of 5 Stars!]