While the premise of this anime is very unique and the progression is pretty good, I found the ending is a bit disappointing. The ending is not as grand as what I have thought in the beginning of the movie and left me with a feeling of "What? Why?" just because it is a little bit rushed in their way to the major villain's reveal. Most maybe caused by the travels that supposed to feel a little bit longer in that time feels too much fast like they were travelling with planes which was not invented back then. It was not immersive. I think the best way to fix this is to make the travels a bit longer and that's why the first half is better than the last half.
Which that leads us to the character building of this anime. I think almost all of the character is not fully built and I think it as a major flaw caused by how the story flows. I felt like Friday and Watson's background was not explored enough to make us attached to them even they are the main characters of this anime. It is a bit saddening since I really wanted to know more about Friday and Watson's relationship before Friday's supposed death.
The soundtrack is pretty epic for their action sequences but I think the most impressive is the ending by EGOIST which has this vibe of mystery and made the anime ended with more mystery lurking around it.
Overall, I think this anime have so much things to be patched with. Since the world build has been done so well, this anime have a great potential but ultimately wasted it in the last half of the anime. You still should give it a try, though.
