I have 3 of the original Sensibo Sky devices and the app works well, setup was generally smooth and it was reliable - adjusting the entire home AC from a phone or iPad just became normal….remotes became obsolete. If you want worthwhile improvements in every area the Sensibo Air is the better choice. The “Air” is a much more polished device with better IR directional emitters, set up was smooth, app function for devices in multiple homes is as simple as it gets, one power button press of the original AC remote and it knew all it needed to control everything. The separate motion sensor/thermometer is excellent for rooms, such as a small office, that you come and go from infrequently during the day and don’t need to run heating/cooling constantly. The number 1 feature benefit of the “Air” over the “Sky”…..is Apple HomeKit integration. Just turn on HomeKit access in the Sensibo app and the tile shows up in HomeKit and you have control over on/off, heating/cooling, fan speed, sch