I've been using my Amplifi Alien for nearly a year now and so far it's been rock solid. I haven't ran any speed tests besides the initial ones reported here, but I haven't had any problems with speed, range or disconnects. I have enabled the 5GHz 4x4 AC band and I've connected my main computer to it, while all other wireless devices are connected to the AX bands. Transfer speeds between devices seem pretty close to having a wired 1Gbit connection, which was the goal and I'm happy. Having to use my phone for accessing the router's settings turned out to work fine and they keep rolling firmware updates on regular basis (although no 160Mhz bandwidth yet). I'm not sure if there is a good reason to get an AX router at this time, and even less this one in particular, but at least so far it does seem to function reliably.
