I upgraded all my outdated hardware last night and ran into multiple issues with the new hardware, although some of my devices are connected. I have an ER605 router, Netgear POE+ switch, and two EAP610 access points. 
First, the controller software does not recognize any of my devices, but I was able to directly sign into my router and APs over the internet interface. So they both have SSIDs and passwords. My phone and Apple TV are able to connect to my wireless signal.

However, the second issue is that my Simplisafe camera will not connect to the WAP to complete its setup. I ensured it connected to the 2.4Hz band; it pulls up the SSID and I input the password, but it won't connect. This camera was working on the old WAP which was a Ubiquiti.
Lastly, I tested my Apple TV and tried to watch a new release from Disney+ but it gave error code 11 and said this show is not available in my region (but I watched the episode the day before on the old wireless system). For some reason, it seems to think I'm watching over a VPN, but I don't have a VPN configured. 
I'm sure it's user error, but I'm not entirely thrilled with what is always sold as a seamless process.