Love it !!
I'd use it in a heartbeat !
I use FD anyway and have for many years and don't have a bad word to say about them. I presume the usual safeguards apply so if Im hacked they give me back my money... There's not enough in my account to make it a worry 
If it makes the current system easier it gets my vote. Im fed up with having to remember a million ( slight exaggeration there) different passwords uppercase, lowercase, numbers, special characters, check my phone and generate a key.... bugger, got it wrong, ran out of time. Start again.
I shop online extensively , this is just another iteration. I vote yes 