I think the format in which this book is told is both it's biggest strength and weakness. 

The interview/epistolary style with the interviews and logs and diaries are pretty great at giving you an overall view of the situation from all perspectives, but they also prevent you from connecting to any of the characters outright.

The characters themselves I found to be pretty one-note at times, especially two of the main women, but they served their purpose enough, I suppose, apart from annoying me to hell at times.

The plot was fun and a breeze to get through, like c'mon, who doesn't like giant sci-fi mecha with a dash of political thriller? I loved watching the strings being pulled by Him behind the scenes, and I'm curious enough to know more about Him that I'll probably grab the next book.

It's a good setup, with some pretty interesting themes and ideas, though not the best characterisation maybe. Still had fun enough to try the next one though.