Okay that is pretty good review of the crypto debit cards. However I am very concerned about the few things which makes me stop from even trying these cards. I get nervous by the thought that what if I am using the card one day and suddenly there is huge problem on the block chain of that card provider? What if my transaction does not pass through then it could be very shameful for me to stand in the line when the cashier will say your card isn't working dude! Lolz what if anything like that happen. I mean with the MasterCard and visa nothing like that happens and I can ship free minded with that one.
I know this is very wired thought but to be honest we cant trust the crypto currency on such high level! At least not me! But good review.
There's a misconception regarding your use of Bitcoin Debit Card.
In order to use your Debit Card you will need to exchange your coins into USD, which then will be deposited into your card. This exchange are done automatically when you reload your Bitcoin Debit Card by your debit card provider (WireX, Coinsbank, Bitwala, etc). This way, if somehow the blockchain are slow or even stuck, as long as you still have money inside your debit card you can use it freely.
Besides, if the cashier says that there isn't enough balance on your card or "your card isn't working dude" you can just pay with cash in hand, no shame about that.
Unless you had no cash at your pocket, I would be shamed and wash their dishes or something