i agree with both the critics and the admirers. the premise is stupid, but so is mortal engines, the golden compass, westworld, etc. it's escapism, not reality.
gandorf is right though, in that it has a quality feel, not a network television, made for tv cheesiness. plus, they briefly alluded to a couple of plot points that happened in the past, besides the revolution, that are enough to peak my curiosity to see how it plays out. there was another murder, besides the one they brought in the detective for, an there is something going on between jennifer and the asian chick. she told her as soon as the investigation is over we can get back to the other thing. then there's the detectives ex-wife and their relationship - why they broke up, how she rose up in class, etc. then there's the whole wilford enterprises thing and the charade she's pulling off.
the garden and the aquarium are dumb. the idea that they somehow have enough food on board to feed thousands of people for years on end is dumb. the idea of a train going around in circles for years on end is dumb. class struggles and the politics of survival in a post-apocalyptic world are not dumb, and are concepts we can all relate to so i'm in.