The whole thing is basically an empty shell. My issue is that I wanted the feel of the Thinkpad, wanted to use a smaller X series computer as my main computer, but also wanted a large monitor. The external keyboard is the same as what they use on the laptops, but the shell does not offer as much support as a dense laptop body. So I was really filling it with goop in order to make it solid and heavy. The noise dampening was a side benefit. The hardest part of the whole thing was getting the case open.
All of that said, it is still not silent. I think the only way you are going to not hear the keyboard at all is to go in the other room