I used Bunq to withdraw from BL3P, a crypto exchange in the Netherlands that also uses Bunq. I only withdrew small amounts monthly, 1000-3000 EUR. I never had an issue or was asked any questions.
What I did have issues with was Bunq's support. While traveling abroad, I tried to withdraw cash from an ATM but it gave an error and no cash was dispensed. However, I was debited by Bunq account for the withdrawal.
Afterwards began a 3 month long ordeal of having to deal with their terribly organized support. I was tossed around different support agents like a hot potato without any real solutions to my problem. In the end, they said they couldn't do anything and that I had to contact the bank that managed the ATM and have them investigate. Bunq said that they would need a letter from the other bank saying they investigated the malfunction and found an issue.
As I had left the country, I had to make many long distance calls to the bank and use Google Translate to explain in a foreign language what I needed. The other bank told me they couldn't do anything and that Bunq needed to send an inter-bank (chargeback?) request to start the process. I told Bunq this and they said that the other bank is wrong and that they needed to investigate the ATM. I finally connected with someone who spoke a little English at the other bank and they said they would investigate. Their investigation showed that no malfunction had occurred and emailed me a letter saying the same. I sent Bunq the letter and they said they couldn't help me any further. I then gave up and considered it a loss.
It was only after complaining on social media and a personal finance forum did I get Bunq's attention. Someone from Bunq saw my post, contacted me with his apologies, and refunded my account for the failed withdrawal.
As
@dimitri mentioned above, their support chat is useless when you have an issue that requires any type of thinking or investigation. I thought that paying 8 Euros a month would entitle me to some kind of decent support. However, their support was
actually worse than the support for some of the free banks and services I use around the world.