I find it works ok on amazon music and tune-in radio but had bother getting it to play anything else. But like you say @Mick its beta so early days. I am hoping i get spotify intergration through sonos
I think if you change the language to US, it assumes your in the states and connects to American servers. Just an observation, not sure if it's any use? Lol
Reason i recon this is, earlier i asked Alexa for Dirty Boulevard by Lou Reed, and the American accent said "i can't find it". Now I've had it playing before, so I changed back to UK and it played it.