I use my rings on a daily basis. I used it with a Samsung Galaxy Note 2 LTE and now Oneplus One (for a couple of years now). I used my rings for unlocking my phones via Google's NFC Smartlock and NFC Ring's app (1 ring to unlock both; otherwise, input 2 different PINs). The other tags of the rings are used to toggle wireless (wifi/LTE/bluetooth/GPS), toggle brightness.
I've used them from Android Lollipop to now Nougat, stock and custom roms on both phones. What's nice with the NFC reader on the Oneplus One is it sits right on my index finger and it reads it pretty well (90% of the time) if I just tilt my ring on my index slightly out.
I'm also a backer for both NFC Ring campaigns. I have enough rings to feel like wearing 2 Infinity Gauntlets...