Well, it was okay. It was stupid to even think this book will be as good as The Martian. Of course it wasn't. Starting from the story line, to the plot development, cliffhangers (I don't think there were any in this book) and the final delivery. And may be everything described in the book was scientifically and technically correct, I had hard time following some of the stuff. Whereas The Martian was easy to follow for anyone with high school science knowledge, this book extends that a bit further. At places went a bit arcane. Another thing, at the start of the book Andy Weir was really trying convey that the story is happening on moon. He mentioned like a million times that the gravity is 1/6th of that of Earth. Yeah, we got that first 10 times you mentioned it. Don't have to say in every chapter of the book! He had a few guidelines as to what a body of law will look like on a city established on moon, but I just refuse to accept that a place like that would have such off the hand kind of law. Felt it depended too much on the mob justice. Really not the best way to govern a city on an inhabitable moon.

In any case, it is an okay book. Read it if you don't have either Martian or any other Asimov book lying around!