I've used it but only to be able to use it (I had to go out of my way, basically ate at McD's a few times).
Unfortunately I don't shop many places and none of them are places that support Apple Pay/NFC (McD's sadly is the place I go the most that has NFC).
Hell, the company I work for's competitor outright supports Apple Pay/NFC and we don't (happily we also aren't one of CurrentC's supporters either though). And I don't know if we will anytime soon. We have the pads that support the pin cards but that part doesn't work (In fact every now and then I catch a customer trying to use it and have to tell them they have to slide the card, that the slot doesn't do anything). But the pin pads still don't even have the capability of supporting NFC so I doubt my job will be updating them soon as they won't need to next year (they can just turn on support for the card slot that doesn't work right now). And they will stay on tech for a while. I had a job at it in 1994 and when I got rehired post 2000 they were still using the same computers for the cash registers. I think we only got updated ones a few years back.
We just got ipads this year and I was shocked they actually did.