I use it all the time on my Note 3,Now the question is does it work? Most places I go the terminals don't work at all,Ive even had a few cashiers telling me I cant use it and I have to use a card only. The one place though Ive always had success is at Mcdonalds.
The stores that have them but not working is Home Depot and Office Depot. This is at least in my area.
i've never seen anyone do it, but i use my contactless debit card all the time, it's great -- but also bad, you lose track of what you've spent, as it's such a quick process