We use Alexa quite extensively at home for music, timers, alarms and switching, etc.
Daughter bought me an Echo Auto for Christmas and I've just got round to setting it up.
It links to my iPhone and uses mobile data (or wireless if in range); plugs into the Aux port for the ICE and seems to work well.
Same function as the Echo at home. so I can turn on lights, etc before I get home (or off when I've forgotten before leaving!). I can talk to someone at home via the drop in function of Alexa
The supplied mount is for the air vent but doesn't work too well on the RR, so going to use a piece of sticky-backed Velcro to stick it at the rear of the central armrest.