Yes, that's me
The PSU is the Nano also from Streacom and it is solid state so no noise. Has a big power brick which sits under the desk.
Building with the passive cooling heat pipes is initially a bit challenging because everything has to fit. Plus getting the right m/b was a worry. Also you have to keep TDP below 65 watts which allows i7 but not K overclocking. But in the end it's pretty easy. Watching the cpu package temps and feeling the heat coming off the fins is a highly satisfying thing.
I was inspired to go for the Mac Mini shape from Snazzy Lab's excellent YT video "$682 Skylake Mac Mini Hackintosh Build" which got me started with Hacks. Looking for cool ITX cases got me to Streacom and when I saw the passive ones, I knew that was for me. Heaps of fun.
I have looked at their DB4 cube chassis which can have double cooling for the CPU or alternatively can cool a GPU but it has a fairly low TDP limit for the GPU (75 watts max), so I figured not worth it, although that case does look awesome.