I found these short stories interesting to read--you really get some insight into some of the characters in the Fallen series. But, I found when I was finished, my overall reaction was merely, "meh."
Surprisingly, the best part was Roland's short story. If I were rating the book just on that story, it would have gotten 5 stars. I loved seeing how Roland's past choices consume his present self, and after choosing Lucifer, he can still feel love, shame, and sorrow. Hopefully we can see more of this Roland in Rapture!
What bothered me?
I got bogged down in all the details again--just like in Passion. There were entire pages that I just skimmed because it was description after description after description. There was a point I wanted to yell, "Get to it already!"
Nonetheless, if you like the Fallen series, you should still check this out, just for the sake of seeing a little deeper into the psyche of the angels.