After interviewing several companies and getting quotes, reading Yelp reviews and asking for testimonials via messaging, I decided upon AZ Dukes of Air. Since it was end of May, I needed some sort of relief and they provided a back up window unit, loud but it helped somewhat. All of the workers were very courteous and I offered beverages as it was quite hot out. They did an Ok job on insulation area, so I called the office and they sent a tech out who dramatically improved the insulation casing. He came on the weekend and even bought materials at the local Ace hardware.
It was nice to get a courtesy reminder call for the heating unit check and tuneup and the tech Kalem was very informative about showing me how to use my high tech temperature setter and reasons between types of filters used.
We are very happy with our new AC/Heater unit that replaced the nearly 19 year old one. The savings is showing and the feel of an even temperature, without drastic changes is wonderful.