It's injection molded plastic and not 3d printed like I originally thought. I love the mounting holes it has to secure the Arduino or Raspberry pi. I wish it came with an 830 breadboard, but that's ok. Mine is not super flat, but it's close enough.
I really like this board. Very convenient. The only complaint that I have is the screw driver that comes with the kit is completely useless for the screws in the kit. The screws need a larger Phillips-screwdriver.