Recently ordered and assembled this mini PC. Installation instructions are very clear and it's easy to complete despite everything being so tiny. At first I used the stock cooler, however, it was very loud and it made an annoying high pitched sound. Setting it to silent fan mode, did help a bit, but it was still too noticeable. So without any research I quickly ordered the Noctua NH-L9I chromax.black (stupid) and the additional AM4 mounting kit instead of the 'regular' Noctua NH-L9a-AM4. I say stupid because later on I found out there is a 3 mm size difference between the Intel one (i) and the AMD one (A). This size difference does actually matter, meaning it didn't fit at first. The cooler itself hit the RAM modules or the VRM heatsink. So I loosened the VRM heatsink screws a bit (tightened it a bit afterwards) and the Noctua finally made its way in. It does not touch the RAM modules, but it does contact the VRM heatsinks, but all seems fine so far. I feel like there isn't too much pressure on it.
The end result, wow, what a sound difference! I don't hear this tiny machine at all now and I'm very happy with it. All in all, I would say: very small build, easy to assemble and a decent amount of storage options. That said I would definitively recommend a better/more silent cooler to finish things off. If you do so, order the correct one and double check before hand if it fits -.-.
I ordered an extra USB Cable for the extra 2 x USB 2.0 ports via Aliexpress and I'm probably going to buy the vesa mount kit too. Runs great so far, but the only issue I have is that I have to manually switch the input mode of my monitor back and forth after it wakes op after sleep mode. Searching for a fix.