DavidAce
The Dual PIN feature is really great, it allows me to pay for both private expenses as well as shared expenses using a single card.
If you're a bit obsessive like me about controlling your finances, then having many accounts for different kinds of expenses is really neat. Currently, if you have to make a payment with a card you can "only" choose between two different accounts. If you want to pay from a third account you'd have to carry around a second card (which bunq allows for luckily).
It would be really nice if I could set more than two (unlimited?) PIN codes that target different accounts so that budgeting becomes much easier.