Way too much action and unnecessary slow motion
It's written for movie goers in theater but when you get it home to watch at your leisure it fails to draw you back for more than one viewing.
I suggest Jeremy Brett's work as Holmes is by far the best portrayal of the detective, this is just not my cup of tea. A horrible use of Moriarty even the hint of him in the first film was underwhelming.
I myself would have saved Reichenbach Falls as a ending for the final 3rd film keeping in faithful to Doyle's original intent, setting the film apart from the current "superhero" status many have attached to Holmes and making him mortal.