General review:
As a long term fan of mysteries, especially Sherlock Holmes, this drama didn't stand its ground at all. If anything this drama was Tekeuchi Yuko and the others, that's how I viewed it.
I watched BBC's Sherlock show more than twice, and every time it felt like a new series, with all the excitement and thrill. But Miss Sherlcok, although this my first time watching it felt like a bland version of Sherlock, where Sherlock seemed sometimes to miss out on obvious leads, or be absurdly smart.

Cast and characters:
As I said above, Takeuchi has done a good job, I didn't like she sometimes behaved like a child instead of a careless character, and the poor writing of her deductions, but in general she was very good.
WATSON (Wato-san): This was the biggest downfall for this drama, I couldn't stand this character no matter what. I was taken aback when they introduced her as Watson in the 1st eps because she was everything but Watson's character. She was completely useless from start to end. Her medical knowledge was never used and she didn't add anything to Sherlock's pockets. I also disliked how unforgivably stupid she was.