I think the worldbuilding and the historical accuracy are entertaining. The characterization of Nagasaki and it's interactions with the European/Mainland powers is neat.
Though, I think the characters are kind of boring.

Overall I'm not sure what to think about it. It's OK.

I like it quite a lot. Sometimes the character interactions are a bit boring, but the missions are really cool and the episode with the circus guy was wonderfully done. It's a shame its English name and, uhh, poster or whatever you call stuff like the OP image look so generic because I'm sure people like me passed it over without someone on kissu telling them that it was good.
Still don't know the deal with the archer guy, though. I hope that part is explained because it kind of sticks out a lot compared to the other relatively grounded parts of the show

It's probably one of my favorites this season. The world building has been thoughtfully put together so that things slowly begin to form a wider picture of the overall conflict going on with the opium trade. With bits of the Revenger business itself sprinkled here and there, and the morality/questionable aspects of it are highlighted in a way that I think will lead to more interesting developments come later in the series, possibly next episode even.

Some of the characters seem better developed than others, but they're all sufficiently established. As of writing my favorite little murderous psychopath seems to have gotten the most development so I'm satisfied. One thing I find regrettable though is that this is only 12 episodes when at the end I'm sure it would benefit from having been longer.

Better than the Tokyo variety.

The main thing for me so far is the setting, other stuff I'm holding off from writing my opinions about since I'm hoping for Gen to further spice things up.