I use my Echo exclusively with non-Amazon services:
Google Calendar, Spotify, Philips Hue.
So the product is quite open. That being said, the third-party experience could be smoother - it is a minor pain to have to specify "with Spotify" every time I want the Echo to play music.
So the product is quite open. That being said, the third-party experience could be smoother - it is a minor pain to have to specify "with Spotify" every time I want the Echo to play music.
Overall I'm happy with my purchase, though.