Great game, even for early access!
-Your shots actually hit.
-Great shooting mechanics
-First or Third Person Mode
-Little or no lagging
-Ability to use mounted machine guns that are already set up on and inside bunkers.
-Great for casual and competitive players.

Downside:
There are a couple bugs, but none of them have major effect on game play.
For example, climbing latters and cliffs may be difficult, but it is not impossible, takes some getting used too, but nothing too major or extreme.

Conclusion: I highly recommend trying it out, it is free after all! Fun game!