I bought the bare metal unit.  Installed Crucial RAM (2x16Gb) and a 2TB Samsung 980 Pro M.2 SSD.  Unit was placed in a room with temperature control and in an area with plenty of clearance for heat to flow.Performance was good.  Case felt hot when CPU under load, but I have another fanless unit (different brand) with an i3 CPU that also gets hot and has been running for over 5 years so was not concerned.In about a year the computer froze all of a sudden, and after rebooting I kept going into "insert boot media" mode.  SSD dead.  Have many other Samsung SSD drives on other computers for quite a few years without issues, so I suspect that heat dissipation from the SSD is not very good, which would make sense since it's located at the bottom of the unit and close to the CPU.  Maybe if I had used the Samsung model that comes with a built-in heat sink it would have been better, but bummed that such an expensive SSD died so soon.