Small and unobtrusive yet still plenty powerful.  I mounted this to the back of my monitor using the included VESA adaptor plate.  Even at full load, you can barely hear the fan.  With an NVMe drive for storage, it is really snappy and responsive.  I was also able to connect it to my 4k TV and watch various content (streaming and local).  Pair it with a nice wireless keyboard and mouse and you'll have a very clean setup with minimal wires.  There's even a USB port that is always powered in case you want to charge a phone or other device even when the computer itself is off.