I don't have an Apple Watch yet (probably after Christmas 2015) but I've enjoyed using Apple Pay on my 6 Plus here in the UK.
There are a couple of times I've done things incorrectly (therefore delaying the process) but it's good to know there's an option (besides my wallet) when I wish to pay for goods.
There are a couple of times I've done things incorrectly (therefore delaying the process) but it's good to know there's an option (besides my wallet) when I wish to pay for goods.