Surprisingly good. First time I've ever read anything by Karen Traviss, but I've heard of her because of her Star Wars Republic Commando novels. She does a very good job writing scenes of battle and war, as well as the camaraderie between solders. I also very much liked the dialogue between the characters in this book, and she has really filled them out by what they say and how they act. In fact, I liked the "character building" parts of this novel much more than I liked the action.