Damn! What a book! Loved it!

As is inevitable, one would compare it with The Martian, and so would I.
It is slightly more sciency than Martian, and as good as Andy Weir is at explaining complicated physics or biology or chemistry in this case, some parts might still remain inaccessible to general public. That just means you won't understand how a specific thing works. Lack in scientific understanding, in this case I believe, takes almost nothing away from the plot or story line. You still enjoy it almost as much.

And the author certainly took a bit more liberty with the boundary of science than he did in The Martian. Somethings are questionable, from the standpoint of physics of it, but hey it's sci-fi even if hard sci-fi, so one has to let it slide.

Overall, a great book from the author and more than makes up for the disappointment I felt after reading Artemis!