With my past experience with devices like this that so-called work through communications through household wiring, the performance has been very poor.
Initial application was going to be for a commercial building ( a food store ) where I didnt want to have to string a cat5 cable across rafters and down to a new Cafe Express register that was floting out in the middle of the store, and since it had an outlet drop from the ceiling down to it, it would have worked perfect to have this drop work for both power and network communications.
And here is where the failure began with this device:
#1 - The device for the network bridge like communications over power line has to be on the same phase leg between both outlets that allow for the device to tunnel communications across over the hot leg.
#2 - Not just does it have to be on the same phase ( hot leg ), but for better speed and reliability it also has to be connected to an outlet that is on the same circuit breaker... essentially making the distance shorter for the communications on the hot leg as well as minimization of noise.
#3 - Even when on the same circuit breaker, same phase ( hot leg ), the communications were poor. A persistent ping indicated latency that was bouncing all over the place and sometimes time outs. Latency was anywhere from 100ms to 1000ms with each ping a value in between and sometimes a timeout on the ping.
What I ended up doing instead is buying a Linksys Wireless G Bridge device that allows for this stand alone device to sync up with wireless and connect via Cat 5 cable to the Fujitsu Team POS 5000 cash register.
So anyone needing to extend their network in their home to network devices that do not have wifi and there is no wifi internal integration or external wifi dongle option for these, I would highly recommend buying a wireless bridge instead of one of these powerline network devices. Maybe these powerline network devices have gotten better over the last 8 years, but reviews online still indicate them being troublesome and hit and miss, with mostly problems.
Personally I still like to just drill a hole and run Cat5e or using Wireless G or N where holes shouldnt be drilled.