Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Extraordinary breadth of vision, with heartstopping action and conclusion

I'm not sure what others have found so negative about the Rama books. The ingenuity of the multi-layered intelligences, and the religious overtones really resonated with me. The great strength of the 4 Rama books is the fact that one can achieve a genuine flow, with believable characters: some real heroes, some genuinely evil people, and the rest, like most of us, somewhere in the middle. And the plot can unfold at a sane pace - rather than cramming every idea one has into one book. And a very mature, subtle, spiritual ending.