If you're a survival horror fan, you'll probably love them. They have everything you'd expect from the genre, and they're one of the few survival horrors that can genuinely make you feel really uncomfortable.
The pace is slow, but if you're into survival horror that's probably one of the things that attracts you to the genre. In the first game the analog sticks are reversed when you're in first person view if I remember correctly - so the left stick is your look stick. It can be quite disorienting but you do get used to it.