Hi David,thanks for that.Does the Global traveler give you a rubbish rate of exchange.? See you soon .
I find that the exchange rate with CAXTONfx is very good. It is also clearly displayed on their web site.
As long as you do not use the card in the UK or go into a bank and draw cash over the counter there are few charges.
Please note that in the USA you will usually be charged to use an ATM. This is a charge applied by the American bank and will apply to ALL cards in addition to the fee from the card provider (free with CAXTONfx). The machine will warn you of the charge. I think this charge is typically about $2.
David