Watson - this is a long drawn-out affair!
This Sherlock Holmes story was that way, painful. A lot of reading and listening to dialogue, cutscenes that could not be ended and awkward puzzles.
The story was an odd mess of madness, mayhem, cultism, violence and some gross bits tossed in to round out the lot.
It really wasn't fun to play and there were technical glitches that caused me to re-boot several times. The graphics were merely okay.
On the positive side, the inventory worked well, the voice-acting was good, keyboard/mouse control is good, sound was fine albeit not musical at all.
Avoid or pick up at the bargain bin only.