You print out each layer by using a chest's 2D grid inventory which is really an ingenious way of using chests and speaks to the level of depth that can be found in the game.
Unlike many of the Minecraft projects that implement a simple CPU, this project actually has a practical use as you can actually build things out of it.
The objects created can only be 6x9x10 and while it's really cool that a tool like this can even be done in the game, the items are small and will only be of so much use.
This project comes with its own launcher, which allows for easy launching and access to the themed game. This way there is no fiddling about as it is as easy as clicking on one icon.
This means those that go into this version of the game are subject to the rules set forth by the owners, meaning you are not free to do what you want and are at risk of being kicked out no matter how much time you have invested.
Things in this world are still getting updates and fixes and is a growing project. While there may be issues with it, it atleast means that the developer listens to the users and will address issues they have, which is a good thing in such an expansive project.
While this project is massive and quite an ever growing accomplishment, the seas in the game are quite bare and offer nothing. For such a lore laden world it would be nice to see the oceans as an area to explore as well to the land based overworld.