Was very disappointed with the purchase, I opted for it at the first announcement, but guess the marketing was possibly misleading.. when it says "play and control YOUR music" I was expecting it to be able to control my own music library (that's where MY music is) the fact it can only really be used to choose music from a streaming service (which I don't use very often) was a big drawback, as well as the inability to create a stereo pair with my Play:1.
it also seemed buggy, and difficult to play any playlists from my pandora account, and didn't recognize that I have a household setup, so wouldn't change to my wife's amazon prime library as oppose to the one in my name (the amazon app allows that, and the sonos app allows that, but not when the two are combined).
so with those limitations, and the bugginess of the amazon alexa app on android, it had no real use case for me, so I took advantage of the 45 day free-return service. I was also unaware that the software was a BETA.. I don't think it is being sold like that.. some chart of the functionality between devices would be good to have on the website so people would know what they are buying.