I have been playing that game since the early kickstarter days. I probably have more than a 1000 hrs on it. I saw it evolve to become a very fun and very detailed colony building game. At this stage of devlopement (ALpha14) the game is fully playable, very well balanced and will offer you hundreds of hours of gameplay.
-Extemely engaging game. You care about your little colonist when something bad happen to them.
-Big fan base with lots of mods
-Good sound fx and soundtrack (the soundtrack is little limited ATM)
-Great range of difficulty setting. From the story teller to where you choose to land, your game can be very easy to extremely difficult
-LOTS of freedom in the way you want to build and manage your colony
-Detailed trade/medical/crafting systems and mechanics
As of Alpha 13, the only end game objective is to build a ship to leave the planet.
Limited music (i usually play mp3 over the game music)
I honestly cant think of anything else..thats how much i like this game.
Buy it! Now!