If you just have internet service from Verizon, and your router is already hooked up to the ONT by Ethernet, you can pretty much just pull the cable from that and hook it up to any Ubiquiti unit. I have a USG 3 and it works swimmingly.

For those who also have TV service, it’s more complicated, since the STBs talk TCP/IP over MoCA for various services (I believe including the program guide and DVR functions). The Ubiquiti forums have lots of posts on people trying (and succeeding) to get their gear working with FiOS.