Bought it Saturday. Overall, very nice. I particular, the crossover section [Vile Darkness, Exalted Deeds, etc.] is very thought-provoking.
Now that I've read the feats section for myself, I'm stll on board. There's no way to make sure that any given player will make an effort to roleplay the cultural/geographical background associated with his regional feat...but in a world as vast as the Realms, I think it's a great character hook for players new to the Realms.
And once again, I find myself wanting to do a high-magic game based in Halruua...