Adventure games are not for me...
But, this one has got some good qualities. Most noticeably, at least to me, this particular Nancy Drew game features a lot of traditional occult symbolism and you have to familiarize yourself with it to pass some of these puzzles. You get to learn runic, alchemical symbols and astrology symbols as well. So that's cool. The puzzles are also quite satisfying to solve, once you get it. Admittedly, I did have to consult a FAQ on a few occasions.
The interface of the game is pretty traditional for first-person adventure games. You have to click left or right or up or down in order to get anywhere, otherwise there's a scrolling screen where you get a 360 view. The thing is that navigating through the manor can get really tiresome. You sometimes have to solve a puzzle over again in order to get where you've already been. At that point, it's just annoying.
And speaking of annoying, there was one particular puzzle where you had to get an answer from a character, navigate to the point of the puzzle, plug in your answer and then run back... four times. And did I mention that you have to do one of those puzzles to open a passageway to get to the place where the puzzle is?
Well, I give this one a passing grade, but you feel more like a puzzler than a detective. THOUGH, there is a plot point that was never resolved that is driving me crazy.
TL;DR - It's a puzzle game, not a mystery solving game.