The controller also handles roaming, as I understand it. I have a software controller on a VM. They provide a .deb! I have 3 EAP670s and an EAP-655-Wall. Roaming works perfectly on phones and laptops. I have a hidden SSID on each individual AP that I use to lock dumber stuff. Some devices fight the AP Lock on Omada.
I see the value in going 100% omada, but I couldn’t justify the cost of the switches I’d need. Their routers look good for the price too, but my use case is a notch or two above their target market.