As someone who used Google Assistant, I’d rate that experience at an 8. Can turn on conversation mode and continue to add multiple items to a shopping list as an example.
Alexa is about 7.
Siri is Apple‘s most un-Apple offering. I’d rate at a two. As a programmer the logic it uses is infuriating and so simple to fix. I use it daily. But if I get in my car and ask for directions to a location, why would it assume some random address in Rhode Island 2,345 miles away, over a location 10 miles from my location.
And, instead of saying I can’t do that, search the web for it instead. Once you learn the limitations, and understand it can do like 7 things well, it ads slightly more value. This and the fact they only sell a one size over priced HomePod tells me they haven’t figured the experience out yet. The seriously need to fire the executive in charge of this area.