6/10/15 I waited 6 days for an appointment. Then David showed up at the wrong time and argued with me about the time of the appointment. He never greeted me or called me by my name. He walked in and proceeded to tell me incorrect information about what I had told him on the phone. He was aware it was an intermittent problem and when he came by it was not making the noise. Then when he was here, it did start to make the noise, but he did not hear it. He kept repeating the same information in a condescending manner, never making eye contact. He then said "I'll have to call the office to see what they want me to do" and poof... he walked out my front door and I never heard from or saw him again. He simply left my house, drove away, never called back or anything. Karen P.