An absolute 10 out of 10!
This is the Anime that shows class disparity the best way possible. The story is
mainly focused on William James Moriarty, at the beginning of the season the Anime shows a great background of the character and how they ended up being in a noblesse family. Albert who goes to orphanage and takes responsibility of these two clever little kids is an interesting character aswell, he started all this, along side with his brothers (the two kids i mentioned), the dream of a perfect britain, without any class disparity, but don't expect him a key role in the whole season. Their goal is the most important thing, [Spoiler: because they do anything for it, they even killed their own corrupted family.].
It knows how to make you care for the puzzles, and they solve it in a logical way.
If you view it as the Sherlock side of things, William becomes a villain, but in fact, he is the real angle who helps weak people to get their revenge, to do the justice. It's all that matters.
I've seen people saying that ED is not suitable for this title, but relax! it's anime! you can expect a heavy metal music in a romance Anime! lol 😂
besides, the song itself is pretty good. And OP is amazing man! It's epic and beyond perfection in my opinion. So nothing wrong about the soundtrack in this Anime.
Artstyle looks great and it's perfect in my honest opinion. I don't even need to talk about it because there's no problems with the art.
As a result, I think this Anime is a masterpiece. It has no extra nonsense bullshit like many of the Anime series do nowadays. You'll enjoy every second of it. And seeing William surprising Sherlock with his outstanding skills and his infinite intelligence is a fun journey.
I'd gladly give this Masterpiece a 10/10.