Yeah, I'm the OP, I finally got mine, and it does work pretty well. Since my wife's car's sirius account now includes streaming, all I had to do is hook that account up to the alexa app and I can listen to all my sirius radio stations with my voice. It lacks the ability to quickly "channel surf" since it's all voice controlled, but I'm happy. I'm also able to get spotify to work, although I guess the spotify API doesn't expose the daily mixes which is like 90% of what I listen to with spotify, so I can't play those playlists.
Overall, I'm happy with it
Overall, I'm happy with it