After almost nine months it is time for a verdict on my “new” WiFi access, the Ubiquiti Networks UAP-AC-PRO. I can honestly say that it works extremely well here and all the WiFi issues I have had for years, have simply gone. The device is comparatively expensive (I paid about 140 Euros at Amazon) and unless my existing solution had not caused so many issues, I probably would have not spent the money. But for me it was definitely worth it.
I was initially made aware of the Ubiquiti Networks UAP-AC-PRO by an article on a German website that covers Apple-related topics. The guys there were quite enthusiastic about it and especially its graceful and uninterrupted handover of connections from one access point to the other. The latter had been a particularly nasty issue for me, with a Fritz!Box Fon WLAN 7390 covering the ground floor and an FRITZ!WLAN Repeater 450E, configured as a pure access point, covering the first floor. There simply was no handover, so I had to effectively configure two completely separate WiFi networks. In addition the FRITZ!WLAN Repeater 450E needed a regular power-cycle because for no apparent reason it would stop working every couple of days. Its predecessor, a FRITZ! 300E WLAN Repeater, was much better in that respect, but it had died after a bit more than two years.
So all in all the situation was not too great on the WiFi front. This changed dramatically when I replaced both the Fritz!Box and the FRITZ!WLAN Repeater with just a single UAP-AC-PRO. Or in other words: Juts one UAP-AC-PRO gave me better WiFi than the both Fritz components combined. Impressive! In consequence, the seamless handover of connections from one access point to the other was not relevant any more at all. So instead of buying a second UAO-AC-PRO, I just have one and all is well. The flip-side is that I cannot play around with this feature ;-).
To sum things up, I am extremely satisfied with the UAP-AP-PRO. For administration I run the Unifi program on a Raspberry Pi 3 (model 2 worked just as well for me) and I will write another post on some of the setup aspects of that later. If you search on the Internet or look at Youtube, you will also find a lot of additional information.