I have mixed feelings. Some parts of this book were good and some parts bad. The first book, Wool, was absolutely wonderful but the rest had two important problems: 
 1- Slooow progress with a lot of what I consider fillers 
 2- We know things that we shouldn't know, and sometimes we don't know things that we should. A lot of times i had to just push myself through the book, waiting for the characters to find out about what I already knew. Except for the first book, this goes on almost until the end. The only thing that happens is more and more characters find out about what we found out in the first book. And Hugh Howey's writing, and the closed and boring environment of the Silo aren't that interesting to make the reader follow the book despite the lack of interesting secrets to be revealed. 
 TL;DR: When I read the first book I thought it was going to be a very different and novel story, but it turned out to be your typical people-stuck-in-a-place-after-apocalypse story.