Writing: 4 Plot: 4 Characters: 3.5
Good, old fashioned, space adventure. Well, moon-in-space adventure. Solid, clean writing. Lots of great descriptions of science and engineering applied to problems. Diversity on every page but in the way I like: Artemis, the largest (and only) city on the moon, is populated with people from all over the Earth. The characters of the novel were of multiple ethnicities, colors, genders, and sexual orientations. And these characteristics were completely orthogonal to their choice of profession, whether they were rich or poor, honest or prone to criminality. I did a quick analysis and found that of the four characters who appeared the most intelligent, three were women, so he did err on the side of political correctness with that one — but why not?
Overall a fun read — the strength is in the writing and the adventure, not in any new ideas (which I prefer in my SF) or character depth — but I read it in a single sitting and enjoyed it, so no complaints!