What i like are the budgets and the ability to switch with 1 card. The realtime update comes in handy for when my kid is at the store, i get a ping when he used my card and know when to expect him back. And, when he's in highschool, i don't want a ping when he's in class. But he doesnt need to know that yet.
I need to wait to open the 2 free accounts for the kids, but i have ordered an extra card for my oldest son. So when he has his free account, i will share his savings and spending'folder' with him and he can think about what money he spends and what he saves.
The multible accounts are great for keeping insight on budgetting. I know what i have left to spend on growserys, hollidays, car repear, etc. I do have a doubt to open a savingsaccount at Knab, but that has more to do with the interest, i expect to be saving more than 10k next year, it would be stupid not to try and make it more. But i am not sure about it yet, i dont want 3 bankaccount from more banks, i want 1 bank for everything. At this moment Bunq has my vote, but saving doesnt give me anything extra.