I love this game. It's not really a hidden object game, as there aren't any traditional hidden object scenes. It's a game that's hard to categorize. It sort of has a bunch of mini-games. It tries to make you feel like you're an actual character, so you perform tasks related to solving the case. The story is good, and I was thoroughly engrossed when playing it.
For a casual game, it has a lot of replay value. I go back to it all the time. It has several different styles of card game, and I think that really keeps it feeling fresh and interesting.