Dear lord how this series deteriorated. I loved the first book with its Firefly fan-fiction vibe, but this is...well, a mess. 
 Doughy armchair general gung-ho military fetish crap, flavored with a soupcon of libertarian bull-- pseudo-philosophy. Also a disturbing Waco homage and a truly cartoonish villain who's motivations NEVER made any sort of sense (seriously, my first question is how does a raging psychopath rise up to be security chief on a mission of such importance???) 
 Pardon my ranting, but I did absolutely love this series at the outset and it completely broke my heart to see what utter rot it had disintegrated into... 
 ETA: I originally gave it one star, but that was simply my raging disappointment talking. I changed it to two because one star should be reserved for truly unpalatable writing and this is certainly serviceable. Also, I got a little Miller-time (even if it's not really Miller), and I liked a few of the scientists (tho the whole fangirl crush on Holden was a bit over the top), and it was fun to check in with Miller's old partner from Book 1. 
 Still, this was no where near the story I'd hoped for.