Arms-Commander was an interesting Recluce book. I've enjoyed reading all the previous Recluce books and I also enjoyed reading this new book (I have to confess that I'm a Recluce fan).
I liked the characters (Saryn was an interesting character) and I also liked the story. I think it's amazing that the author can still write good and interesting stories, because he's already written several Recluce books (not every author can write like this, but Modesitt can).
I think that Arms-Commander is a "must read" book for all Recluce fans. If you've read the previous books and enjoyed them, you'll like this book.