I read all three. I thought they excelled at creating new plot devices. Sentient particles, Thought as light, dimensional weapons. Its really hard to come up with new sci fi tropes! And Liu casually comes up with a dozen new ones. I thought the characters and plot were... unsatisfying. But I believe that is mostly intended as a portrayal of people's failings. I'd say it's a worth it read for real sci fi junkies though. Definitely disagree that it is "Not good", but taste is subjective. They seemed longer than they needed to be... I dunno.