Oh my god I'm so glad this slog of a read is over. 

I feel as if there was often no room left for a reader's interpretation. Society and certain scientific tools were overly explained, making me have to skim read certain parts to be able to make it to the end. I'd rather just use my imagination to fill in the gaps.

There were also multiple moments in the book where possible potholes were explained via an awkward dialogue between characters. It made me feel as if the author was trying to impress me with how smart they were. Much was written as if it was an unlikable science teacher explaining to you that whatever scientific theories they taught you was the absolute truth and you were just expected to be impressed.

I found it hard to identify with some of the characters reasoning to do some drastic actions, but that's just personal so that's fine to me. I am surprised that no human figured out Luo Ji's plan. It was oddly simple even for someone without a background in the related fields.

The misogyny felt icky but could be explained away with "oh this is just how the main character thinks", but I would've liked to see more strong female characters.

I am again impressed by seemingly very unrelated scientific concepts being blended together into one fictional story. It was just much slower and longer than the story deserves.

I'm fine just stopping the series after this book and not bothering with the third.

For a book whose story I feel like I understand so little, it really manages to hit something. Not sure what my emotional reaction is, but it's sure something! 

The first half of the book is a bit of a slog--you're spending a lot of time with a main character whose main personality traits are laziness and (I would describe it as) misogyny. Luo Ji just isn't as compelling or complex of a central character as Ye Wenjie was in the first novel.
That said, once things really start moving halfway through, the plot picks up and the book dives again into the big-picture, sci-fi/sociological ideas that Cixin Liu is so brilliant for. The payoff is definitely worth it, but this one is more of a slog than the first book to get there.