I would say more of the same with this book compared to the other 2 in the series, but that wouldn't be quite true. In my "review" of Extinction, book 2, I mentioned that the characters were quite static and that there wasn't much in the way of discussions on morality, etc. There's definitely much more of that in this book, though those types of thoughts don't stop Colonel Riggs from doing the things he feels he needs to do.
To me, this was definitely a stronger book than Extinction, and like Swarm, gets me interested in the next book in the series. Conquest, book 4, isn't out yet, but I'll be looking forward to that one.
Need to decide now if I'm going to move on to a new series, or if I'm going to go back to Steven Erikson's Malazan series, reread books 1-8, and finish up with 9 and 10, now that the series is complete. Leaning toward Malazan.