i read that amazon just has around 2 million songs right now. google and apple catalog is like 20 times larger. i am not finding many indie groups that i listen to. but it's not that big of a deal. the only problem is that i cannot use it when echo is being used.
Try setting your location to US in the windows app or windows somewhere(dont’t remember where). You will be able to download the app this way(if it is available in the US). I downloaded and watched Netflix and Hulu this way when Netflix was not available in India. You dont even need to connect to VPN to download the app if the location is set to US
I tried linking Prime Music to my Bose SoundTouch account. It is showing my US Amazon details (though I don't have US Prime subscription), don't know what is happening. Out of curiosity opened the web version and installed app, not a fan of both at all. I am sticking with Apple Music for the near future.
one benefit of this service for echo owners is that you can finally create custom playlists and play them using echo.
echo does not immediately notice your custom playlists. takes a while for the playlist to get available through cloud.