I used Ultimate HVAC many times, job ranges from adjusting condensation pump, install thermostat or the whole heating system. They are always available and responsive. They did miss little things here and there sometimes, but they always come back quickly to fix them. I had tenant moving in once and the AC is not working. Their technician squeezed it in their schedule after work hours without me having to ask twice. They are a very well organized and hard working group. It's great to have a company that I can rely on.