I voted "no."
I tend to avoid all things Faerunian (it's just not my cuppa). I did buy the main book, Magic of Faerun and Underdark. The first two mainly for the prestige classes and the underdark book looked like it would be generic enough to be portable (which is was).
I may change my mind, if enough people say that it's great and easily usable in a number of settings.