So I have put quite a few hours into this now, which gives me enough of an impression to actually write this. That is not to say that time played by default makes my opinions correct, or at all helpful, but I will try.
So I have been keeping an eye on this game since pretty much the start, maybe 2 years, not sure. But so far I have noted these key points.
#The developers seem quite dedicated.
#They seem ambitious, almost to a fault but not quite.
#They are a recent announcement to upgrade to unity 5 shows they wish to improve even what seems to be set in stone.
#They are slow, but they are also detailed, few game crushing bugs have ever popped up.
#They are a small team, and not as vocal with their community as I would like.
(keep this last one in mind when I describe the game, as it means alot when it comes to visual assets.)
#Graphics are pretty good in some ways, but a letdown in other.
#The art style for humans leaves them feeling a little less real, and can be seen as a little cartoonish
#Character customization leaves a lot to be desired but has come a long way since earlier versions.
#Animation leaves a lot to be desired but it has been already announced they are going over the animations from scratch and making very impressive leaps, set to be released in 0.90 along with Unity 5 engine.
#Combat is currently clunky, ranged weapons are your only real weapon, use a bow at first but aim for a laser weapon ASAP and a large supply of batteries. Combat in melee is not an option at the moment but in a recent video they have shown great progress in the combat system coming in 0.90 Unity 5 update.
#AI is parted into what seem to be factions, often you will see animals fighting in clear and defined rolls of hunter and prey, truly one of the fantastic parts of this game.
As for my impression of the game as a whole?
I like it, I played through all the story that is currently there, and when I hit that first message saying I could not take this mission because it was not currently complete, I was left begging for more.
However I do worry the 0.90 update will require a total restart of my play through, but with all I have learned, and baring major changes, I will be able to do everything even better and even faster next time round, I know where you hid my aluminum you sly dogs!
I would buy this game again, but there is one fact I must stress to all consumers. So please read this and take it to heart.
This is an early access game, you may end up with something you did not expect, it may be bad, it may be good, it may be total trash, but you knew this going in, you paid for an unfinished untested product and it is your risk alone to take!