Well.. They are saying that the game is in early access, but the game, in my opinion, is done at this point. There are a few issues, that might explain why the game is in early access.
First of all I want to talk about the negative parts of this game:
- Optimization. It's very bad, unfortunately. Yeah, most of the maps are running with a playable frame rate, but when your imagination begins to increase you are starting to use all the tools, Your PC starts to suffer. Sometimes you play with 40-60 fps. Somebody would say that is a comfortable fps for them. But in my opinion, a large sandbox with so many mechanics is just critically low. Anyway, I think it's a problem of early access version and developers will solve this problem when the game will officially release.
- A pretty hard campaign. You need to steal or break something. Sounds easy? Don't want to disappoint you, but it's not. You have a limited time to do all this. When you arrive to the location you need to make a plan how you are going to manage all this using any of your tools and objectives, for all this you have unlimited time, BUT. As soon as you pick an object you need to steal the alarm start to shout and after this moment you will have only 1 minute to pick all staff and escape. Still sound easy? Maybe it is not that hard, but you must have good imaginative thinking after all. That's, basically, all negative parts (in my opinion).Now positive parts, there is much more to say about it.
- Best Sandbox. I wouldn't say so if it wasn't true. The details in this game are very realistic, thank's voxel graphic.
- Tools. I'm not going to write a full list of them, let it be a surprise for people who've decided to play this game. I will just say they Fitt the gameplay perfectly.
- Graphic. Even though it's not optimized well, the graphic looks fantastic, a especially if the time on the location is around dawn. The lights in this game are phenomenal. I would like to admit, that I'm very categorical for graphic part.
- Sound. Oh my god, my ears are so happy. All SFX sounds such as main menu button click, all interaction sounds are a pleasure for my ear.
- Game design. The fact that in the sandbox you are breaking and stealing staff instead of building and creating is a very interesting choice I would say. As we all know, in Minecraft it's all the way different so the choice which devs have chosen is, in my opinion, the best the could.
- Physics. I'm not going to write a lot about physics, but it is the most important thing in this game. Every little cube is connected to the others and you crash them, they will fall apart that way as you did it.

Totally, I would say that I will recommend this game to all people who are very creative and doesn't know where could they use it :)