2 and a half hours through the game. Story is very interesting. But it's hard to to put all the pieces together, at least for now, but it feels like it's supposed to be that way.
As for the sanity effects... Denis you're sick! Those things are not even funny.
They ended up killing me a few times, and I even fell for one I knew was in the game.
And that mansion is creepy man. Seriously, I'm scared to walk down the hall. You'll understand soon enough.
Graphics are great, sound is awesome, story is really deep. I think Fran said you need to really put at least 6 hours into this game.
Trust me, you want this game.