Oh, the teenage angst! Oh, 
Imriel. 
I like how Carey changed these novels structurally to reflect the difference in Imriel's narrative voice, as opposed to Phedre's. Phedre is always looking back after a story is done, much with the "and this upcoming moment was really good!" or "if only I had known how important this thing was at the time!", but Imriel narrates concurrently with the action for the most part. I find that interesting. 
Normally I love coming-of-age stuff, but for the most part I didn't care about the stuff Imriel's coming of age covered. I wanted more about his college buddies and less about how angsty he was over his married lover. If we were going to spend that much time on the Unseen Guild, I wanted a little more substance and less moping by Imriel. (Whoever said he brooded too much 
didn't lie) I totally wanted him to have a fling with his buddy Lucius.
And of 
course there was a siege. I think there is a one-siege-minimum for these books.