Yeah, it seems to be working just fine with FNB. I'm not rooted, but definitely running a custom ROM at the moment and it had no issues verifying me and allowing me to transact in no time at all.
I installed Pixel Experience and their site has guides per device. It's not hard if you follow the instructions carefully but I did hit a snag when I was doing the unlocking of the bootloader. The software used refused to run on Windows 10, so I had to load Windows 7 on a spare SSD for it to run. For some reason it wouldn't see the phone when I tried to use it in a VM.