This is easily the most significant Exalted book release since Dreams of the First Age.
For starters, the Unconquered Sun: he has stats, artifacts, and a full suite of powers. He is clearly explained both in terms of his character and motivation and mechanically. Both are overwhelming. The chief god of the setting now makes a great deal of sense without closing off other possible opportunities for interpretation. From crack-addled derelict to unflappable hero, all can be managed by reading his section.
Observances describes the worship of the Sun, and the response one is likely to get.
Charms - this section is outstanding: there are new high-essence Charms, low-essence Charms, a new Martial Arts style, and even anima upgrade Charms. All are fantastic. Clearly the Charm-writers know their stuff and have a great grasp of both the classical heroism the game is built on and the Hollywood heroism many players strive for, and have built both into a very mechanically-sound Charm set.
All in all, this is one of the gems of Second Edition, and should immediately go to the top of the list of Books You Must Own For Exalted.
White Wolf should hire these freelancers again - outstanding work. Five stars are not enough.