I don't have that much time in game yet but so far I can say its very exciting and I DEFINITELY RECOMMEND it, partially to support this game and its developers. This game has a lot of promise and potential which it already shows. I really haven't run into hackers compared to other early access games.
The idea of the game is amazing! Dinos, crafting, building, survival, HUGE tropical island, and much more.
Of course there will be bugs and that is a given, its early access after all. I will update my review after further playing but the crafting is nice so far. I would say BUY IT, SUPPORT the dev team, and lets hope they keep updating and never abandon this game.
to be continued...
UPDATE 8February2015 ------------------------------------------------------------------
I found a couple of bugs which I said before I was expecting due to early access and "in development".
However, the crafting is done very nicely. You can craft a bunch of basic items to get your base started, but then you need a crafting table to go further. Note: once you have a crafting table you make make another crafting table (just haven't done that yet, and don't know what options it gives you). You can mine trees, ores and stones (that also give you some ores). The ores you find will be undefined, hence putting them in the crafting table will discover them for you, be it gold, iron, etc... You can also build a furnace which will refine those ores for you into gold bars, iron bars etc, which you need to craft better defenses and items. The fact this game has OIL is awesome, because you need to build a refinery to have power for your light towers and other buildings. The pretty much free choice of building whatever you want is amazing, because you can make your base and defend it which ever way you want.
There is so much more I could write about this game but my opinion from purchase day one hasn't changed. I still RECOMMEND this game and say if you think about buying it, BUT IT.
Bugs: Climbing down your guard tower can be weird at times. I sometimes get dragged into between my furnace and wall and get stuck lol. The weapon mechanics and fighting can definitely be improved.
All in all though, if you like some deep crafting, base buildings, dinosaurs, the danger of other players and exploring. Then this game is for you :)