You need to click "show pin" and you immediately get a 30 second pin code for the payment. For the rest it symply works as any other debit card. Will use it more often!
You can change PIN in any ATM.You don't need to click "show pin" every transaction btw, just first time to know what the PIN is.
The "show pin" will just let you peek at your pin. Once you remembered the pin there is no need to use this option ever again.
My first thoughts was : Wtf, why do i need to press show pin on phone every time i want to pay with card! And i got only 30sec to enter pin! WTF?!
Luckily it is just an option to preview your pin. Works like pin in any other visa card.