This is what I experienced in the game and what my opinions are of it right now with about 2 hours of play (at the time of this review):
Clones - I can compare this game all day long to a bunch of different survival games, sci-fi games, etc. Not only is that not fair to do, it's impossible to find an exact clone. This game has elements from many different games, crammed into one. I'd say this game is more like Rift than anything else in that regard. They found what works, what was unique, and great and compiled it into their game.
Graphics - I'm a graphics ♥♥♥♥♥... I like looking at things on my computer that don't bore me or damage my eyes. But, I also can find ways to disregard graphics with gameplay mechanics. This game solved that problem for me, because it has game mechanics I like, and looks amazing at the same time. This is top tier graphics and I was stuck on a low resolution. I streamed the game, it still looked absolutely amazing where others would look terrible.
AI - I liked the way the AI functioned and responded to you, even if there was only one type. The one creature still managed to do a number of my "base" and was fun to hunt down. I enjoyed grabbing them and slamming them into trees, or better yet... throwing them up into the air and shooting them mid-fall. Like some sadistic skeet shooting. :P
Freebuilding - This reminded me of Rusts style of building, without the whole naked man junk in my face. It's quirky and needs some work, but overall I could sit all day and build a massive base for myself. If only saves worked. :P
Performance - I have a solid rig and I'm glad this game treated me right. I usually get penalized for having a decent computer where my GPU or CPU is either not used enough, not balanced, or just flat out not compatible. Not only did it work great out of the shoot, it performed perfectly. I had a few instances of lag, but then I was also streaming too. I could see frames dropping on me, but not frequent enough to be a major issue. That's the sign of a good solid foundation of a game.
Saves - I mention this first so it's out of the way. You can't save. So, everytime to jump in, don't get attached to anything. This is supposed to be fixed and the rumor was in a patch by 02-06-15. We'll see if that happens because that will be HUGE for people.
Crashes - I list this, and not sure why I use the plural sense... because I had only one. I didn't get too far into the game (about 30 or 40 minutes) but because of the saves I lost everything. The crash may have been a collision issue that I'll forward to the devs. But, another hour or so of gaming... and not another crash.
Multiplayer - Or in the case of this, lack thereof. I am a HUGE multiplayer guy and usually pass these games up if they don't have it. I took a gamble on this game and am satisfied with it, but I would be a fool not to mention that this game is IDEAL for multiplayer. The devs say it's a likely future addition... but until then, I'll be disappointed without it.
Content - There's not much to do once you have a huge base and killed most of the creatures nearby. You can't explore and find anything else (besides resources for crafting). No additional AI, lairs, ship crashes, survivors, etc. I think once the base game gets finished more content will be added, but if you're hoping for this right off the bat you will be disappointed.
All in all... worth the price of admission. I'll be playing it when I can and enjoying what the game has to offer in the meantime. Keep up the solid work and I look forward to seeing what you can add.