Which movies are you those, pray tell?

Like being filmed in an actual abandoned Mental Institution? I don't think so.

it doesn't bring anything new to the genre, movies like this have been made and have been made better
so many movies, so little time

SPOILERS********************************
I think the twist and somewhat abrupt ending left a bad taste in people's mouths. It seemed like the movie was leading up to something really big and ended up disappointing the average viewer.
I remember first seeing this when I was maybe 11 or 12 and thinking it wasn't scary. Then I saw it when I was 15 for a second time and started to really get into the atmospheric and psychological aspect of the movie.
It's too bad because I've noticed the rating go down over the years. I too question some the aspects of the twist for example if Gordon really killed his family towards the beginning of the movie then how is he able to go to work as if nothing happened at all. Guy must have one hell of a poker face. I understand he was losing it but he was acting way too normal on the first couple days of the job.
But I think the setting and atmosphere make up for any plot holes. It's rare to see a movie filmed at a location this authentic. Props were added but not a significant amount.

I gave it a 9. It's a real horror movieas in not so much scary as disturbing and unsettling.

You seriously live in the renovated building?

This had genuine characters and it was genuinely unsettling. This is a gem.
In fact, I just finished it. Moved into the old sanitarium last week. Wondering if those tunnels are still underground.