Simply put: if you have enjoyed Cherryh's previous books in this series, this is a must-read. If you haven't... why are you still reading, anyway? And if you have not read the previous books, start with Foreigner.
This book has, in my mind, much more action than most of its prequels. Much is going on, and in a relatively quick tempo, even though, in a way typical for Cherryh, we get also a great deal of Bren's thoughts and self-reproach. I admit that there have been times in this series when I have found it a bit too slow, but that didn't happen in this book.
It is difficult to say anything too specific about this particular book without giving things out... except that maybe, if you haven't yet read any plot summaries, you shouldn't do it at all. I think I might have liked the book even better if certain things would have taken me completely by surprise. Anyway, one thing I enjoyed in this book was Cajeiri. Our "little" rascal is growing up. (And still being a rascal.)