Hi, I had trouble connecting Spotify through the app but if you connect it through the web interface it should work OK (or at least did for me). Hope this helps.
Yes spotify seemed to be a little buggy connecting, but its working now. Im really hoping they get round to the sonos and Alexa integration soon, I think I’ll be emailing and seeing if they could find their way to putting me on the beta.
If got round the lack of IFTTT on the UK version by creating a virtual ST button and having IFTTT use that as the trigger instead of a striaght command from Alexa to IFTTT.
If you prefer the US voice, you should still be able to pick that by going into the settings of the echo/Alexa. (As long as it has updated its software to version 4008).