Using two Cambium E400 APs. Great 5GHz AC coverage in a concrete wall apartment. No single AP I have tried was able to provide 5 GHz coverage to the entire apartment. The 2.4GHz band has more than 15 networks showing at my location in the Auckland CBD. It is consequently unable to provide the reliability I seek for 8-10 connected Wi-fi devices on the network.
I know it is overkill for a home network doing a bit of Netflix and Lightbox streaming but it sure works well.