Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An imperfect but perfectly entertaining fiction about science

I am a 40 year reader of Sci-fi, and this book's flaws seem very apparent to me: too much detail that interferes with the pace of the story, a bit of awkwardness in providing too much character dialogue, resolution of the core problem too far before the actual ending of the writing. But I forgive the author all of that because the book's positives kept me engrossed, interested, entertained and reading: great hard sci-fi details and background, good characters, good beginning with the evil bad guys right at the start, very inventive plot problem, lots of surrounding color, and characters that act out deeper personalities. I liked it. I will pick up Cramer's Twistor and try that one, and because it was written earlier I'll wish I had read it first, but I expect to be entertained nonetheless.