[AT] O/T - Credit Cards

[Dennis Johnson]

Mathias,
 
I agree with others who recomended both Mastercard and Visa. 
Traveling a lot, I try to have each available just in case there are system probems with one provider, or in case there is some special odd business that only does one of the too. Normally the businesses that only do one are more common outside of the US, but I still advise having one of each.
 
Thanks,
Dennis