Super user friendly after initial set up. There were a few hiccups getting it to connect to HomeKit but a few resets and it has been flawless ever since.
At first I was worried that this unit would not work as promised but after it was installed the unit was and is outstanding. Not only was I able to control all functions of heating and cooling right from my smart phone (iPhone X) but it also easily connected to my google home. Very simple to use too...no technical terms or rocket science certificate required...I love this unit!