I give credit to Andy Weir for knowing what The Martian did well--setting up a bunch of technical problems as load-bearing elements of a plot--and going and executing that same general plan, but with new particulars and bigger and with fun new ideas. The made-up sciencey stuff feels infused with principled ideas about how new things we haven't discovered might work, rather than designed for their role in the story alone. And he's willing to write an ending!

There are things he does not stand out at, but those don't take you out of the story. As people work through things on Earth a lot of the nontechnical parts are, I guess, simplified, but I can't care that much; I didn't pick this up wanting a bureaucratic or psychological thriller. And he (or he + early readers and editors) usually make sure to quickly and efficiently get you through all of that to the next fun part.