I don't think many would agree with this but, I think the manga started off great until chapter 55, **spoiler** where Sherlock and William fell in the river **end of spoiler**, after that the story becomes so unrelated to the original plot, to the point where it got really boring to me and unreadable. This really bothers me because I was such a huge fan of this work, I loved how the story was portrayed in Moriarty's POV instead of Sherlock Holmes. And as you can tell from my profile I'm a huge fan of this version of Sherlock Holmes. I really recommend the anime over the manga, since it ended properly and the ending was satisfying as well. The only down point that some scenes are poorly animated but other than that it's perfect, and a great show to put your time in if you're interested in crime, mystery, and detective genres. Hope this helps :)
I feel that the author wasn't really allowed to end the manga and was forced to continue with it because of money purposes?