This was an excellent read. I generally don't read as much science fiction as fantasy, but this was included with my copy of The Dragon's Path (which was also good). I can usually pass over scientific inaccuracies for the sake of the plot, but as a professional astronomer I am always happy when the author pays attention to detail and conforms his/her work to real science. That said, this is not hard scifi- there are no explanations on how drives work, etc, but the main point is that orbital mechanics (and thus the consequences of how space battles will be fought) is accurate. 
 The story is also quite engaging. In scope it just covers the solar system and if you've ever taken an intro to astronomy course you should recognize all the places they visit. The characters are very interesting, but I wish there would have been more than 2 viewpoint characters. I feel it's aiming to be epic, but by just going back and forth between just these 2 characters it reduces the scope and makes the story a tad predictable. 
 In conclusion: I am very happy with the book and will be checking out the rest of The Expanse when it comes out.