Alexa will play songs from Spotify through her own speakers (which is acceptable on the big echo, but the sound on the dot is no better than a little bluetooth speaker) and she can do various shizzle on the Sonos (radio, songs from Amazon music, etc.). She turns the bloody sound down on Sonos (even if it’s playing something I’ve put on myself from Spotify) when she’s asked to do something, but she can’t frickin’ play songs from Spotify through it. Bleedin’ ridiculous that they’d all push the “LOOK ALEXA CAN CONTROL YOUR SONOS” line without it being able to play from the most used streaming service out there. But that’s tech these days – everything seems to get released before it’s properly ready. Anyway, they’re working on it, a solution will be here soon I reckon.