It's decent. It's a slow burn, but it's ok. If you've read the novel, you already know the "big secret" of the story, but that's fine. The visuals are nice, some kind of future sovietpunk thing. I'd rate it 6.5 or 7.
Then you'll have the full surprise of the story. I hope you enjoy it. And if you do, the book was quite good (also, there again, some of the surprise will have been revealed beforehand).