The MacMini gets really hot. The Chassis acts as a heatsink. Mounting under the desk I'm wondering if that'll be an issue.
Good point. I check from time to time if the MacMini is getting too hot but for now it seems okay. The mounting bracket is obviously totally open on one side and on the top (or bottom). The air vent (at least I assumed it is an air vent) on the MacMini is aimed at the exit of the mount and has no obstructions.