Yeah, leaning towards it; 66% is good enough for me. Not played a really good survival horror in ages. In fact, probably not truly enjoyed one since Silent Hill 3. I've got the first Amnesia game, which I haven't got round to playing, but Outlast does look like it will scratch that itch. Also, I'm in the camp that loves the shorter 5-7 games these days. It's an age thing, I think.
The last one I remember playing and enjoying, was Condemned. And I'm hoping it is on the short side as well. I only have a week plus before school starts again.