I'm embarrassed, I use it only in the AP connected to a Freebox (not to lose the TV + phone if I bridge ...). But as you say that the 5GHz AC OMG ... It's almost as fast as gigabit cable, a crazy thing wifi! It also allowed me DEliminate the interference due to saturation of 2.4Ghz channels: before, when I was doing a large copy or backup (TimeMachine) in 2.4Ghz, I had a generalized slowness on my network but also on all RF2.4Ghz my Bluetooth or device. For example joysticks Playstation 4 stopped working time of the transfer or the Freebox remote rowed or unresponsive. Now that I am in 5GHz, I no longer have any problems!
Firmwares are average and often buggy, hoping Netgear fast rule that ...!