I just finished reading this volume and found it to be very nice, possibly the best of the saga (maybe a close second after volume4).
The mass murdering at the begining of the book is simply glorious (pun intended) and the Korradath is a very funny and live dungeon, if a little too small ( i especially apreciated the fluidity of the encounters, well connected to previous player actions and Chorus).
The missions in the middle are also well varied and interesting. Including other elements of the campaign, such as the inferno gate is a marvelous idea as well. My favourite point of the adventure must be the final lines on the Big Bad Good Lady description..and the alternate ways of..dealing with her..reminded me a lot of the first Mass Effect game.
Continuing the campaing is also a very interesting article, especially for the high level stat block presented...very looking forward to any player foolish enough to face that. Also, what to do with a good artifact was a very nice read.
I loved the bestiary, filled with high level celestials, it felt very consistent with the needs of a high level evil campaign.
All in all i am very satisfied with this volume, the art, tough being somewhere a bit too dark (but that gives out a lot of atmosphere) looks very good, except for a certain high level cleric, way too plain for being such a high level cleric. If i must find a ngative element i must say that i'm quite surprised by the numbers of high level paladins present in the Glorious Reclamation army. Tough i understand that lower level enemies would have counted for nothing.