I was totally impressed with the integrity, professionalism and product quality offered by AZ Air Conditioning & Heating. When their sales rep visited us the first time, he listened intently, asking pertinent questions along the way. We were looking to replace our whole system - furnace, air conditioner, and humidifier. When he made his proposal on his second visit, he actually suggested we wait a few more years before replacing everything. However, I wanted to go ahead anyway because our system was already 10 years old, and was having a few minor problems. He had recommended a highly efficient system, which was what I was looking for. Their proposal looked good, and the price was reasonable, so I had them replace everything. The installation team was very professional and friendly. However, after the installation was completed, I felt the Heater, which was maybe a little too efficient, made more noise than I was comfortable with. It was only an issue because our TV room is right next to the furnace room. The installation guys called the sales rep immediately, and he was there within 15 minutes. He agreed that the noise could be an issue, and was very accommodating. The next morning, the heater was replaced. No hassle whatsoever. The whole process was very smooth and totally customer oriented. I could tell that this is a company that is indeed very customer oriented, unlike a lot of other contractors I've worked with in the past. This is my sixth house, and I have replaced five heating and air conditioning systems in the past. AZ Air Conditioning & Heating provided the best experience I have had in this regard, and I would not hesitate to recommend them to my friends and family, as well as anyone who is reading this review.