To be honest, for an early access it's already extremely complete and well done.

+ An easy-to-learn crafting system.
+ A huge world to explore (even if we only have access to 1/4 of the map at the moment due to the early-access).
+ A well-designed housing system
+ A pretty cool combat feel (having mainly done hand-to-hand combat / tank).
+ Pretty nice graphics
+ Lots of interaction points (quests, resources, pnj to search for, crafting, etc.)
+ The wingsuit feel is great.
+ Simple and effective level and skill progression
+ Good talent tree (I don't know if it's the final one, but for now it looks interesting).

- Minor optimisation issues here and there, but nothing too serious to stop you playing (fps drop, shader loading, etc...)
- A few minor bugs: some weapon textures don't load or are simply missing, shields don't appear. Once again, nothing too annoying.
- Sometimes you get the impression that your inputs aren't being taken into account.


TLDR: Very good game, for RPG / Craft / Survival lovers, you'll love it.
Even better with more than one player.