I bought an Amazon echo gen 3 just to try it with Homey, but hated it and sold it again. There aren’t so many supported devices (if I remember correctly, my curtains, airconditioning and thermostat weren’t manageable with Alexa, lights didn’t work 30% of the time).
I also didn’t like the Alexa app on my phone. And had troubles with Spotify. I could ask Alexa to “play music by Afrojack”, but not “Play music by Daft punk”, Michael Jackson or around 10 other artists that I asked. Which I found weird.
I think Google home is the better choice at this moment, although I didn’t test that. Siri / Homekit also works very well, also in Dutch!