One of my all time favorites, and here's why...
The interface is standard inventory based point & click. There's lots of exploring, talking and pixel hunting to be done. But that's what you'd expect in a adventure game, right?
My reasons for loving this game as much as I do, is as follows. The game is filled with beautiful pre-rendered backdrops that really pull you in, water and weather effects looks realistic, scaling of characters against backdrops are realistic, sound is really well done, atmosphere is also top notch, logical puzzles and a story that kept me hooked until the end. I personally had no problems with the voice acting.
Downsides are. The characters themselves are a little dated even for 2003, but your not playing adventure games for graphics anyway so it shouldn't bother you to much. North American version has Starforce protection which apparently makes the game unplayable on Vista.
I recommend it for any hardcore adventure fan, or anybody who likes horror themed stories.