Used those cards, but they have also weak side - these cards can be blocked with all funds on them. All funds comming from Poland are checked by all banks because of criminal situation in Poland. In other countries card can be blocked already after first transaction and it doesn't matter - have you made withdraw from ATM or bought a chocolate bar... In such situation You loose Your money permanently. I have lost approx. 7k GBP...

P.S. This is good way to get funds from btc to cash anonymously, but first - order 1 card and check, will it be blocked or not. This post is just for safeness of Your money.