Well the general problem with this show is that it is really draggy.
The story can be finished in basically 6 episodes. but they drag it for a lot of episodes. But other than that the production was good. Reasonably good work with the creature animation considering the number of shots. I know a lot of Japanese people were irritated by the portrail of the Japanese. But this is normal in most shows depicting the time so i didn't see anything wrong in it.Same way the nazis are the bad guys for so many years now and the British east india company so its quite normal since they were quite bad in those days.