So true about the checkout I had to wipe my finger and still then it was iffy.. I haven't used it at a pay terminal yet but I will be in the next few days.As much I did like TouchID, I found the reliability of FaceID to be much better for me.
Especially for Apple Pay, it’s amazingly fast. I love the fact that it preauthenticates before you hold it to the machine, so you know it’ll definitely work. There’s been so many times TouchID failed to read my fingerprint at the checkout when there’s a huge lineup waiting behind me.