I have about 12 units at my office and I got fed up with my previous A/C guy who took days to show up and then never permanently fixed the problem. I called Scottsdale Air and they were there the same day and problem resolved. Since then I always call them. In the past 6 months I had them out for 4 different units. Fast, friendly, competent and prices are reasonable. I would highly recommend this company and I will use them for my home as well.