Let's pretend for a moment that Weir didn't write The Martian.  Comparing any book against that juggernaut would result in disappointment.  That being said, Artemis is a fabulous story.  The first half of the novel felt like a lot of set up, having to explain how the community on the moon works, what the culture is, who the main characters are.  I have to say that I didn't particularly care for Jazz in the beginning.  She is gruff, prickly and self-destructive.  Understanding her motivations and her backstory helped to balance this, but I didn't immediately click with her.
The second half of the book clipped along at a great pace.  I found myself invested in the characters, almost rushing through the chapters to find out what was going to happen.  So imaginative, but realistic at the same time!  Really worth the read, even if you can't help but compare it to The Martian.  I am going to have to read this again, slowing it down so I can enjoy the ride all over again!