I really enjoyed playing this game. It's intriguing; the story is good, and keeps you hooked 'til the end, wandering what's about to happen.
+ Graphics: the characters and enviornement are detailed, beautifuly executed and has managed to capture London in its late 1800. The stunning visuals accompanied by a really good sountrack make you feel like the "real" Sherlock Holmes.
+ Gameplay: I just loved the game's mechanics. You can easily switch from the classical point and click game to a third or first person adventrue without any issues. Just depends on how you like to play this one. The puzzles are fun, and logical; the quest for clues search is great; the best feature of the game is the Deduction Board system that makes you understand the motiv of the crime, its consequences and motives behind it.
+ Story: What starts with a simple necklase theft soon turns into a dramatic, somehow gruesome story. I loved this really dark themed tale from the beginning 'til the end. I also enjoyed the dialogues spiced with some British dark humor.
Bottom line: Expect a surprising story, challenging, yet fun puzzle games, and wrap your head around the case to fill in the deduction board.