Ok so I do use this account, here is some additional information for those interested:

The company has a long story. It was funded by Wenceslao Casares in 2013 and owns a military bunker for cold storage on Switzerland (look it up).

Also the accounts are insured by Gibraltar up to 100k EUR.

Accounts are in USD, but funded in BTC, EUR, GBP, or USDT/USDC (ERC20 sadly).

You earn 4% on sats yearly paid daily for your savings in fiat.

Other perks you get is you have an unlimited international Visa debit card (1.1% cashback in sats) without limit - the limits is your deposits.

You can buy btc from the app and send to your CW, also you can pay with lightning up to 100 USD per transaction.

Keep in mind that the account costs 150 USD / year to maintain. So you will have to deposit minimum 4k USD to cover the costs (or use the debit card for travels, online purchases, etc).