The drawings are good and the story is appalling but it doesn't respect the Sherlock Holmes stories.
Sherlock Holmes and Moriarty are rivals, they are the only one who understand each other, they are like the two face of the same coin. If Sherlock choose to escape his boring life by solving crimes Moriarty escape it by doing crimes. And they stand on the same level.
In the manga, there isn't any rivalry. Sherlock is just an arrogant, easy going man and Moriarty manipulate him with no problem, he isn't even interested by him.
John doesn't have any flavor and Irene isn't really badass
Huge disappointment