Anyone using "Small Green Computer" devices?

Your experience?
Have you compared the sound of Vortexbox vs. MacMini/A+, Aurelic products or other streamer/renderers? Please tell us what you heard in any comparisons. Cheers,
I've have a Vortexbox Appliance from Small Green as my ripper and server.  It's been dependable for almost 4 years now.  
Do you mean small computers like the Intel NUC?  Or, do you mean "green" network switches that go into low power mode when no activity is present?