My old Asus DSL AC68U was reliable to cover only a third of my small house. It had difficulty in reaching the third room, but when I replaced it with the Asus RT AX3000, my WiFi coverage expanded twice and the data transfer, thrice. Although there seems to have a compatibility problem in using the old one as Node for AiMesh, its extender's function did the trick. The AX3000 worked as an AiMesh node to DSL AC68U, but not vice versa. In saying so, I haven't tried to use AX3000 independently, but with my current setup, I'm certain my WiFi blankets even my neighbours' area, so I'm stoked!