As it stand now, Slice is cool if you are a bunq user and so are your friends, but there are many banks out there, and not everyone is with bunq, if you now try to add someone from outside of bunq, it will give you the following error:
In this case, I want to split a bill with a hypothetical friend who is with ABN.
So my wish is for slice to work with non-bunq friends as well.
For example, send them an sms or email, and ask them to accept the request like they would with a bunq.me and have them pay it with iDEAL, Sofort, Creditcard or PayPal. To give a few examples.