Truly a fun game. I'd reccomend it to any history or sherlock holmes fans, or even anime fans of Black Butler. I had the same issue getting the program to start as others have noted in their reviews. If you follow the advice given by several other people in their reviews, then the game will work perfectly!
I had quite a lot of trouble with many of the puzzles, and often needed help to get through them, though my least favorite was the map at the end to pinpoint the killer.
The plot, however, is quite enjoyable and very much worth the time and $10 to get it. I would love to collect the rest of the titles for Sherlock Holmes, and I feel each one makes me just a little smarter. The history of it was very well researched, especially the conditions and mutilations of the bodies and injuries they suffered from their murder. It took me about 15 hours to solve, including annoying puzzles. Still, totally worth it, and I look forward to playing it all over again.