I've played a lot of Sherlock Holmes games and this scenario has the potential to capture all the flavor of a classic Holmes mystery. If you're not familiar with the Engle's Matrix Game, the idea is very simple: each player gets a chance to decide one fact in the game and chooses another player to set the difficulty level of the die roll. There, you now know about 90% of the rules. The game engine is simple, but it allows for players to create the game that they want to play, without a great deal of preparation from a GM.
I ran this at a recent game convention and we had a blast playing it. I printed the map and one set of character cards in full color. I printed another set of cards in grayscale, cut out the pictures, and stuck them in foamcore to use as the playing pieces. We didn't have a great deal of movement in the one session that I ran, but the pieces still looked good standing on the board.
The players decided that they were going to play this one a little on the silly side, so there were some funny twists and turns, but it still had the feel of a Conan Doyle story. In our story, the cook was having an affair with a gentleman friend of the Duke. She managed to escape from Holmes after stealing both the Duke's and the gentleman's silver. She booked passage on a steamship bound for the United States, arriving just a little too late to book on the first ship she wanted to sail: RMS Titanic. The gentleman stood trial and was convicted, while his backstabbing lover lived on the stolen goods in a fancy apartment in New York.
All that developed and was resolved in less than two hours. And that's how it goes with these Engle's Matrix games. I'm hooked, and if you're looking for a fast-playing game with the emphasis on character interaction and story, then you can't go wrong by giving any of the Hamster Press' products a chance.