As far as I know, and I may be wrong here, but the Gigabit Homeplug standard has not yet been finished so any products claiming speeds in excess of the Homeplug AV (200mb) standard will be manufacturer specific. Im not saying there's anything wrong with them, they will proberbly work fine and faster than Homeplug AV, but like with the wireless "Draft 802.11n" stuff that was around before the standard was ratified you may find stuff from manufacturer X won't talk to stuff from manufacturer Y. Just something to bear in mind if you add more to your network.