1. Only seems to be able to cast to Google speakers and Chromecasts. Did not work casting to Sonos which is my primary use. 2. Support is atrocious. Transferred from one person to another without warning and no carry-through so you need to repeat yourself constantly. Then I got the answer, yes they support their app, but casting from their app isn't a feature of their app that they support. If you use Android, best to stick with either Google or Spotify for music.