The only thing I'm slightly sad about with my ubiquiti setup is that the Edge Router PoE doesn't integrate with the controller.
It's basically the same hardware as the security gateway, but no way to manage it :(
This video had a good overview: https://youtu.be/XvWOx3PvYFM
The edge router is nice cuz it also has doing and great firewall. One annoying thing is there's no idiot protection... You can lock yourself out of the admin interface and only way to recover is restore factory defaults.
Been there, done that :)