I recently moved from a house that was wired for CAT5 to one that is not. Although I have a wireless N router, I wanted a wired option for more reliable VPN, video streaming, and file sharing/backups to a home NAS. I purchased two 2-packs of the PL1200 (4 devices) using a mover's coupon.
I will mention that NetGear Genie allows you to see the PowerLine devices on the network map, however, it does not provide you with configuration options at the moment. I understand this will be included in a future release. In the meantime, I am utilizing TP-Link's PowerLine Utility to view the transfer rates and modify the configuration of the devices (name/password). This is not necessary, however, as all four devices recognized each other immediately after plugging into the wall socket. The devices will go into a power save mode when they are not being used.
The TP-Link utility reports a rate of ~250 Mbps between devices on the same circuit. Across circuits, I see a rate of ~150 Mbps. This has been consistent for about 3 weeks. The wiring and breaker box are circa 1990's and have the three prong grounded outlets that these devices require. I am using either CAT-5e or CAT-6 networking cables and gigabit switches for other wiring. The primary PowerLine device is connected to a Verizon FiOS Gateway router, the other devices are connected to switches servicing 3 computers, Xbox, NAS. While this isn't the 1200 Mbps advertised, it is sufficient to fully utilize my 75/75 Mbps FiOS connection.
Speed tests run from each PowerLine device were ~90/90 Mbps. They provide a stable connection for VPN and streaming content to the Xbox. In testing, I was able to run two VPNs simultaneously and stream Netflix without any hiccups. It would be nice for a faster transfer rate to the home NAS for backups, however, I am still able to use the NAS for streaming music and videos.
Some gripes I have are: 1) to utilize an outlet, you must plug the device into the bottom outlet which is a problem for outlets that are wired to a switch, it would be nice if the PowerLine could be turned to use top or bottom outlet 2) larger plugs, such as a AC power adapter, will not fit in the top plug when the PowerLine is plugged in, you may want to consider the passthrough version if this is a problem, 3) these are somewhat pricey for the performance compared to competitors online.
Overall, I'm satisfied with the purchase. These give me similar performance to the CAT5 wiring in my old house and were simple to install. You may want to shop around for models with better performance ratings or better software support.