Who knows, you might like the series overall. As for me, I can't remember everything, as I read some of it quickly and then moved on. But off the top of my head, here's what I recall. Some are "holes," some are just weak storytelling, you can interpret as you like.

- The whole massive 100+ level underground city was evidently run entirely by 4 or 5 people. No bureaucracy, no hierarchy beyond the top two people, no economics, no politics (though there is policy). This reminded me of the way TV shows depict government. There's an international diplomatic crisis and it's being solved by the President, their aide, and this one spy (Tom Cruise, Kiefer Sutherland, whomever). Very cartoonish and simplistic.

- The city has the ability to self-sustain, somehow. They extract and refine crude oil, they are producing, water, food, they have an IT division that sounds like it's pretty advance...and they don't have an elevator, or a ramp? (I was told this is explained later, but it made me not really interested in finding out.)

- I am pretty sure the gimmick/big shocker is about the outside being habitable after all, and someone, for some reason using technology to pull the "wool" over the citizens' eyes (I see what he did there). That's not a new narrative construct. That doesn't mean it can't be used, and maybe I am completely wrong. But again, I didn't feel like it was compelling enough to stick around for and find out.

Kudos to Howey for self-promoting and writing his way to success. I think that's good, and inspiring! But when I heard about the TV series being made from it, I thought, "Oh wow, next is the video game: a stair simulator!"

My 2 cents.