I spent about 20 minutes paging through it at the store last night. I just couldn't quite get myself to buy it. Not because it isn't a quality product, I think it is quality. I couldn't buy it because I have so much FR material, and I've already changed the realms a lot from "canon" that I'm not sure I need it and I'm trying not to buy books (this time) I'm not sure I need.
That said, I was disappointed in the lack of detail in the magic in Faerun section (if that is the title). It mentioned (I forget the word, but the complicated word that starts with an F that is magical underground energy) and said it had all kinds of effects on magic, but then gave zero examples, no table, nothing. The same could be said of the faerie ring section, and all the sections in that part of the book. This is the section that could have had 10 more pages and some actual rules in it. I was super disappointed by this section, and it is probably the single biggest reason I would have bought the book had it been done well.