A few bugs and glitches, but very immersive, very enjoyable, the sense of achievement just doesn't get old, even through multiple play-throughs, because you never do things the same way twice.
The game is still in development but the devs appear to have focussed on stability and the quality of the game experience, unlike other devs who just keep adding features to broken games, just making them worse.
And this is a quality experience, it's not a flight sim or a precision FPS, it's a survival game that can be picked up by new and experience gamers alike and just be enjoyed for what it is.
The level of game customisation is excellent too - make it as easy or as hard as you want to, use carry weight limits or not.
Highly recommended.