My simple advice is to take this book immediately. Great content, great art, interesting spells and domains, a huge number of deities to worship. Beginners will be delighted, experienced players will enjoy the high-quality transfer of old deities and demigods to the new PF edition.
It's really epic. Only the endings (!) of some of the sanctioned Adventure Paths can match the scale and spectacular. A beautiful fighting scenes, worthy of Hollywood blockbusters; a difficult choice of Jedi/Sith style actions; one of the coolest chronicle sheet that I've seen. It's here. Definitely play and have fun. That's what you are looking for in 'seeker games'!
This is one of the worst scenarios I've ever played. Alas. The main claim - silly and illogical reactions of the majority of NPC. We played scenario for 6 hours, most of the time spent in polemics, and then gave up. Rating of 1 star is quite appropriate.