Originally installed a couple years ago in a bit of an awkward spot, when we decided to re-landscape we wanted the condenser at the other end of the house. At the same time, we wanted to add wifi to the original thermostats, so they did both jobs at once. The move was seamless, the new thermostats took a few tries before they got it right, as ours is a somewhat complex system--3 zones with a heat pump. Add an outdoor air sensor and wifi and it got a bit tricky. But they stuck to it and made sure everything worked flawlessly--everyone cooperated, from the owner to the scheduling folks to the excellent techs--three of them before the story was over. Smaller company, so wait times were a little more than we might have experienced from a giant concern, but the personal attention was well worth it, and we live in Southern California where HVAC just isn't an emergency. ActionAC also installed our solar PV system, which is also needing a bit of fine tuning, and so far they're responding reasonably. Nice folks, who really seem to care about what they're doing, and aim to please.