My only gripe with these is the QR code is a custom Ballet code and not a standard BTC wallet code. The other Ballet cards have standard BTC QR codes
the metal cards do or did have standard QR's that simply had the address but they only displayed the primary currency wallet address - you still needed to use the app to see the other addresses for the coins that the wallet could hold.
somewhere that changed though as wallets I gotten as recently as yesterday all have a qr code that opens a web page which displays as the image below - the address is there as well and can be copied from the web page.
