Pretty nice little system but don't expect to upgrade it much. The power supply and motherboard are proprietary and there's not much room in the case.I bought a Dell 3880 for pfSense router hardware (yes I know it's overkill) and it works pretty well for that except the CPU cooler fan is noisier than I'd like. It's not loud but you can definitely hear it in a quiet environment. I was disappointed at that so minus one star... they could have put a quieter or nearly silent fan(s) in there.On the power usage side, the system only uses about 20 watts at idle, and that's with the 4-port Intel NIC card I put in there with all 4 ports being used for routing. No spinning HD though... just an SSD.