I liked it at first but then the nationalism/racism started when the *spoiler* information from a sci-fi world was obtained (around chapter 200). The novel paints Westerners as these despicable people who steal technology and smear other countries for no reason. I can't stand it. Sure, some westerners aren't the best people but isn't that true for every country? Maybe it'll get better but I'm not staying around to see the rest of the story. It's a pity. I really liked the story. Give it a try if you can withstand some racism toward western countries (aka Americans mostly).