It used to work well, now by using the app it simply isn't possible to continue the process of setting up a one time card after giving authorisation with your bank, the app refreshes and it's gone. I have hundreds of euros I authorized stuck with klarna because I tried to create a new one time card 3 or 4 times until I just gave up. The money is still being held and it has been over a week. There's zero customer service, if the money is not released in the next few days I'm going to escalate it