I bought this for use as a firewall because it has four built in network ports, and is smaller than my network switch.  Even though it is running a slow processor, it still has more horsepower than I need for running pfsense.  The box does get warm to the touch, running in the low 40s C for a temperature.  The thing I like best is that it just keeps running.  Pfsense works extremely well with this hardware.