It's a black, empty box into which you put a lot of stuff to fill it.
A few years ago I bought (I'm not sure why) a PC tower that was far too big for my needs.
This one suits me much better: there is just enough room to install what I need (including a hard drive and an SSD).
However, even if there is room, you have to be methodical not to get tangled up with all the wires that criss-cross this small space.
But then again, it's still a mini tower...