I think this was one of the better Superiors books (of course, I am biased, having been a contributor). I wrote the revised writeup of Khalid, Archangel of Faith.
This release, during In Nomine's last days, wasn't badly written, but it was an unfortunate choice for a supplement, I think. It should have been a bunch of Pyramid articles. My reaction to the book was "Why?" It wasn't clear whether it was just supposed to be a bunch of ideas for GMs, a set of adve...
It was much better than the Angelic Player's Guide, as many of the mistakes made in the first book were fixed in this one.