I have Time Warner 300Mbps cable downstairs connected to an Time Capsule (last flat 802.11n model). The ATV3 is hard wired to the TC; another ATV3 in the bedroom connects over wireless to the TC. My 2012 Mac Mini that houses my iTunes library is located upstairs and has been connected via wireless also. Running a cable between the downstairs and upstairs would not be an easy task (far from it). I have always had issues connecting to Home Sharing but it recently got much worse when I changed out from ATV2 to ATV3. Now anytime I watch anything on YouTube or Netflix, Home Sharing will disconnect and only restarting the ATV3 will get it to come back (or sometimes leaving it overnight). I have also noticed that since getting the ATV 3, starting YouTube or Netflix is much slower to buffer than normal. In an attempt to see if it would fix anything I bought a Netgear PL1200 power line adapter set and installed it between the TC and the upstairs mac Mini. ISP speed tests showed virtually the same performance (ping 35-35ms, d/l 150-155Mb/s, u/l 15Mb/s. However I immediately noticed a major difference in ATV3 performance; Home Sharing picked up immediately and staring a video was almost instant, and watching YouTube and Netflix did not cause the Home Sharing to stop (and Netflix seems much faster to buffer as well). In my limited testing so far it seems to have helped tremendously. Based on this experience it seems like the original bottleneck may have been the ethernet<-->wifi bridging in the TC, but I don't know if this was the issue or not. I guess I really have 2 questions that come out of this: 1. Has anyone experienced anything similar that might explain my original issues? 2. Do you think that an 802.11ac Airport Extreme and 802.11ac adapter for the Mac Mini would have similar or better results? Any thought are greatly appreciated.