I fell in love with the art piece showing the Lords of the Seven Chains, personally. Mind-bogglingly awesome.
Finished reading it in bed yesterday evening. I love the whole history chapter. I notice that one could piece together a huge background/chunk of Praemal using the Empire of Tarsis and the Diamond Throne together, with the Charad as link. I'll probably do that, even if I doubt it'll come directly into play in my next campaign. I'll try my hand on an extended map of the whole area including the Diamond Throne some time.
The whole part on Religions is excellent, including the Church of Lothian and New Gods (I want to see a Cleric of Ollom, God of the Keg in play!). I plan on adding D&D icons such as St. Cuthbert and "St. Helm" to the list of lothianite Saints.
I'm puzzled by some things I want to know more about, including the shadow of Ptolus, the elven city stolen from the Shoal elves, Goth Gulgamel, the Sphere of Entropy and much more that will be revealed in the next PDFs and the big book.