I live in the UK and fly to Seoul on Saturday for two months. Until now I thought that the prepaid cash cards done by Travelex weren't an option, but I've since discovered that I can load one with GBP and simply withdraw in Korean won in Seoul. I will also bring a debit and credit card with me, and some cash. Does anyone know how usable and widely accepted the Travelex Mastercard cash passport is in Seoul??