Bought this to replace my TrendNet AV500 kit which was rather unstable and kept disconnecting randomly. With my old router (Asus RT-N53), it was rather unstable (especially when booting my computer, it would take about 5 minutes before the connection was well established and it stopped crashing),...
Really fast for powerline; Stable when you have a good router; Allows you to use the other outlet on a 2-outlet plug; Works with older AV500 powerline adapters; Works with other manufacturers' powerline adapters; Did I mention fast
Unstable if your router is meh (at least it was with mine until I changed it; Nowhere near gigabit speeds unless you're on the same outlet; but that's to be expected