Just finished 0.8 and I gotta say: Mist gripped me from the very start and it never let go! I love the mysterious atmosphere (the exploration bits gave me genuine Roadside Picknick/Stalker vibes) and the story is engaging, surprisingly elaborate, well-paced and well thought-out (aside from the deliberately handwave-y cabin upgrading).
You can also feel the raw effort and talent that went into the game - everything is meticulously crafted, from the beautiful and consistent art style to the massive amounts of animations, the engaging music choices and the gameplay design. Also, I didn't run into a single bug over 21 hours of gameplay! Admittedly, there are a couple of typos (mixing up "it's" and "its" constantly) and it did bother me a tiny bit that everyone in the game says "I am", instead of "I'm", but I'm really grasping for straws here to find something to criticise :D
The game is rather linear and not very challenging, which might not be to everyone's tastes, but I think this works really well for a story-focused game. This way, you won't have to worry about making "wrong" choices and both the combat and survival elements give you enough of a challenge to make them interesting, without becoming frustratingly hard at any point.
All in all: straight-up 5 out of 5 and well worth shooting the devs some money for their amazing work!