Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Some enjoyable moments. But not quite worth the time spent reading the entire book.

Pros: Robinson creates vivid images of life on Mars. For the most part, the technical aspects added an incredible amount of realism to the story. Which makes for the best kind of science fiction. I especially enjoyed the chapters that made the space elevator come alive in the imagination as we may never get to see it elsewhere.Cons: His explorations into the sociology,sexuality, and psychology of his characters were often boring,always lengthy,and sometimes unexpectedly and disturbingly crass. (i.e. not for the kids to read)If that weren't bad enough,he also attacks Christianity of all types with a sledge hammer. Declaring it repeatedly as an archaic religion for a band of greedy idiots. All other types of faith are regarded as "interesting" and "progressive". Robinson could have introduced his ideas into the story without being so heavy handed and long winded. Unfortunately he did not.