I enjoyed the previous two books but this one didn't do it for me. While the overall idea for the plot was interesting, it didn't have much in the way of twists or turns to keep you guessing what might happen next. My biggest grievance was than in the last 15% or so of the novel, the protagonists didn't really have any agency. This was a long book of stuff just sort of happening to them, and them reacting in the most predictable way (in fact, the entire plot was about them reacting as predicted). 
 The idea of colonizing a new, unknown world could have added some excitement as a B-plot, and indeed at one point they meet an indigenous race and come into conflict with it, and then suddenly that plot is just entirely dropped from the rest of the novel and they other race is never mentioned again. 
 This book moves the story of the "Old Man's War" universe forward, but in itself is not a very good read. Reading a wikipedia summary of the plot would have been about as fun and saved me a few hours.