I love how fast the notifications are with N26. When I am standing at the ATM I can feel my phone vibrating while the ATM still counts the money to give it out to me. Same when I pay with the credit card at a hotel for example, I know the transaction worked before I the credit card-machine spits out the receipt.
I know this doesn't sound like much of an advantage but it fills me with trust in the system and just feels very modern.