I think it's still worth getting. I haven't played 2 and 3 yet so I can't attest to those. I love the first one because even though you're expecting something to jump at you, you still jump like the first time. There is a fearful atmosphere that sticks.
ETA: Being able to carry over your inventory is awesome. You can enjoy the story without having to put in the effort to upgrade your arsenal and armor.
This post was edited on 3/2 at 8:34 pm