I adore cop shows, Silence of the Lambs type serial killer malarkey...
Even if the plot is hokey I'll still probably enjoy it, so it seems like the game was custom made for me, considering it's my favorite few things rolled into one:
No twitch-based gameplay, branching decision paths that mean more than "Hurr I'm Evil, or Hurr I'm a Saint", Hokey serial killer story, brooding atmosphere... All it could do to be better is be a period piece.
I'm waiting to see if it'll Match Mass Effect in terms of decision making, because so far ME2 is far and away my GoTY, even with GoW3 and the The Last Guardian on the horizon. I love being able to actually play a role in an RPG.
But as some people have stated, it seems like it's targeted at a certain audience, and if you're not in that audience I could see it being a mediocre experience. Eh, I dislike MW2 and Starcraft, and that doesn't mean they're bad games.