Sherlock Holmes is a perfect Adventure game character & this game makes the best use of him.
I always believed that a good intuitive set of commands is the key to a successful game. In this area, this game really did an excellent work-- though I often felt that they should have implemented Jump command. It has been my long desire to play an Adventure game that's designed like an action game. With this game, this desire has been met by 60 percent.
The heart of any adventure game lies in beautiful graphics and interesting puzzles. Holmes delivers a lot of interesting puzzles. Graphically, the game tried to replicate the real London environment of the turn of the 19th century. So its not quite a fantasy graphic presentation like many other hit adventure games.
The voice acting of Holmes is top notch and this is very important in setting the mood for the game. You can never get tired of the classic British style conversation.
Given this, I would say the developers did not work hard on cut scenes. The opening scene is unimpressive and really not mystifying. In fact that might put off people who did not play an adventure game before. There is some problem with sounds too. I am yet to complete the game. But so far I have played, this is definitely a grade A game.