It's addictive as heck! I am liking it better than The Long Dark I think. Because it has an actual story (I know TLD has the Wintermute episodes, but it's not set in the sandbox, it's structured). It has changing seasons and if you are not prepared for winter, you are in trouble. Varied enemies - cannibals, mutants and demons (as you progress). But you can also find places where you won't get attacked very often and you can just build to your hearts content.
SotF is a very very deep game. Part survival, part horror and very hard. I have had more than a few jump scares.