Picked this up on Friday and it's fantastic.
The cut scenes are extremely well done, the graphics and animation are perfectly suited to the game, and the puzzles range from easy peasy 2 second jobs to hair tearing, brain busting conundrums.
The story is a bit darker than the general presentation of the game would suggest, I'm only a few chapters in but already there has been a murder and a shady bloke is running around kidnapping folk off the streets, not to mention rumours of a man eating monster!!
It's easy to dismiss this as just a series of logic puzzles, optical illusions and trick questions presented in the style of a treasure hunt/murder mystery but it all hangs together so perfectly that, once you accept the fact that the residents of St Mystere have an illogical obsession with puzzles (something the game itself pokes fun at), you'll be having so much fun you won't care.
Highly recommended, a definite