to further "explain" my tirade, even a "first look" from Audioholics (a very tech oriented outfit) should include some statement about whether the device even works as advertised. If it was so simple and easy to set up, why not do it and check the connectivity on two completely different AC circuits on two extreme ends of a house or office. There are alot of "anything over AC power lines" devices that just plain don't work, or put out so much RFI that they seriously interfer with other electronic devices in the area.
Inquiring minds want to know..."did the ugly black box actually work ?"