Excellent service. I called in the early morning (they open at 7am) and they were here at 10am. They give you a 2 hour window when they will show (example: 8-10am, 10-12 noon) and will call before they come to make sure you are home. Personnel are polite, clean and know what they are doing...the cooler is on the roof, so their attention to safety was also comforting. They had all their equipment with them that they needed. In one case, the service man couldn't figure out a detail on our thermostat; he called into the main office and they guided him through the thermostat setting. They also know the brands...when I asked if the Master Cool needed a new pad after 2 years, they assured me that the pads lasted 3-5 years in a Master Cool. They take credit cards, checks, or they will send you a bill. They have been in business in Las Cruces and El Paso for years, and I can see why!