The Starwood AmEx also has a foreign transaction fee of 2.7%, I believe, so there's no real reason to use it outside the US, unless you're at a Starwood hotel a

The Starwood AmEx also has a foreign transaction fee of 2.7%, I believe, so there's no real reason to use it outside the US, unless you're at a Starwood hotel and getting a huge bonus that way. In the US it's pretty excellent, though.