Called them on a Friday night for my aunts unit that was not running. He offered to come out right away, but since it was only in the 80's we agreed to have him come out the next day. He promised he would be out between 10:00 and 12:00 on Saturday and he was there at 10:05. Diagnosed the problem quickly and found it to be only a capacitor. Her unit was down, he could have said it was anything and we would have paid it. Appearance was neat and professional, arrived on time and was honest in his diagnosis and repair. I would use them again without hesitation.