What's best for ductless units....sensibo or flair puck

Yes, My Flair DTHs work with Alexa and if you integrate them with the Ask Alexa smartapp, there are even more features (like voice summary reports for past day/week).

Refer to my thread:

P.S. To control your units in a structured & smart way, you’d need my zoned heating/cooling solution which has been customized for controlling My Flair devices with the concept of rooms/zones/schedules.

For more details, refer to

http://thingsthataresmart.wiki/index.php?title=ScheduleTstatZones

For example, the zoning smartapp can automatically turn on/off your window/split unit or portable heater/cooler or any slave thermostat inputted or modulate the fan speed according to the temp differential in the zone…

Regards.