So I beat Fatal Frame 4 today. That was slightly longer than I expected, about 13 hours IIRC. In any case, the game itself was okay, but not something I'd ever want to play again.
That's probably because the whole thing is pretty much "more of the same", with only minor changes. The most noticable one is the camera, which is now a RE4-ish over the shoulder kind of thing, which I didn't really mind. But most importantly, it wasn't that scary compared to the previous games. It made me jump a few times, but that's about it. I remember soiling my pants when the ghost chick climbed out of the box in the second game, but in this one, none of the ghosts were especially memorable.