I am giving the 90 day free trial a go and so far Qobuz smokes Amazon Music HD in sound quality.  Amazon is crippled because it uses Windows sound mixer in shared mode, exclusive mode is not an option. Neither is Roon or Audirvana integration.

The best streaming sound quality I have on my desktop rig using a Yggdrasil DAC is playing Qobuz through Audirvana+. Audirvana uses Wasapi exclusive mode and sounds a bit better than the Qobuz desktop app.
@duckworp,I did read that Chromecast compatibility in the FAQ section, and it is sad that through Chromecast, only standard streaming, not the CD or higher quality.

Going to wait this one out for a bit.
Was very dissapointed with Amazon last go around.
Word so far is that this relaunch is not quite as rosy as they say.
Big surprise.....
Not!
How are you guys getting your Amazon app on your BluSound device. Under “ More Music “, in the BluOS app I don’t find Amazon listed.....?
This was on another Amazon thread, not sure if it will help you.

Amazon HD resides within the Amazon Music service on the Node, its just not very well implemented yet. Hopefully this will change. Unlike Tidal and Quboz where you get album thumbnails that show what the resolution is, Amazon Music just shows albums as a list, with no way to know what the resolution is until you start playing. Once playing, the album resolution will show in the now playing box. I haven’t found a way to search by resolution. This is with the BlueOS app on iPad. Hopefully, Bluesound will issue an update to address this. I’ve signed up for the 90 day trial of Amazon HD but won’t renew unless there is a change in the Bluesound app. If I’m missing something, hopefully someone will point me in the right direction.