Summary: These things work surprisingly well! I would have expected as much using them in a house with modern wiring but this house is almost 100 years old, and so is a lot of the wiring. But this does not seem to phase these. I currently have 5 of them in place on 2 different networks both on the same electrical circuit. And with encrypting, the network segregation is working fine. Set up was fairly straight forward on the first network, basically plug and play.
Summary: My application required that the two units be a replacement for a cable. While I measured a considerable drop in performance, it was still quite adequate and eliminated a long cable that was, in this case, in the way. I'd say it was a good buy, and a good choice. Installation could not have gone more smoothly.
Summary: Pro's 1) setup was very easy 2) speed and reliability have been good thus far Con's 1) the with-outlet version is very bulky to the point that the second socket found in a typical outlet is inaccessible. Important to keep in mind if you are pairing the powerline adapter with a wi-fi access point but have a secondary need for the outlet (to power a telephone base station for example) 2) the unit cannot be on a power strip per the quick installation guide.
Summary: I bought this because I have my home work space set up where the wireless isn't good. Pros: Set up was easy and the connection to my router is now super fast. I get a lot more bandwidth now talking to my home NAS. The bypass is good since it provides one power outlet. Cons: The units are big enough that when plugged into a two socket wall outlet, the unused outlet is slightly covered and not usable.
Summary: These work great, however the extra socket version takes up more space than the four-port version and it doesn't fit where I need it. I have an outlet built into a shelving unit near our home theater PC and, unfortunately, the outlet is close to the shelf. It's designed to plug into the lower of two sockets so you retain access to both. This won't even fit in the top socket due to it's length.
Summary: I bought this adapter to connect my htpc/media server that is in the living room to my laptop that I use in an upstairs office. I do a lot of video production and most of my media is stored downstairs. I tried using wifi to transfer 10gb worth of files and I averaged about 2Mb/s. Due to the length of time it was taking to transfer files I was getting impatient and would have to bust out my external hard drive to speed things up.