Depends on the country. Worked fine in Portugal, Italy, Norway and Britain. Less so in France and Germany—they have influential financial centres.
Good coverage in London, UK but not as much as the US
only fancy restaurants in France/Spain
some small biz places in Venice, Italy but probably only because of the Venice Biennale was sponsored by Amex and their sales people did a push.
Depends on the country. Worked fine in Portugal, Italy, Norway and Britain. Less so in France and Germany—they have influential financial centres.