Reason for service was for a checkup on my five year old unit (I had a coupon). The technician showed up an hour before the four-hour window was to expire and someone did call to tell me he was on his way. Technician was polite and seemed experienced. Check up was performed and deficiencies (out of tolerance readings) were found. During the discussion for recommended maintenance, the technician was very robust in pushing his companies Maintenance Contract. It not being cheap for a 1X/year checkup and me not planning on staying in this house, I declined. I decided to have a controller/compressor cap replaced since he was already here. When I asked where the warranty was on the parts/labor, I was informed since I didn't have a Maintenance Contract with them, there was no warranty. Doesn't seem right to me. I hope it lasts. Nevertheless, my gut tells me this isn't the company for me. I wish I called the company that did the initial installation. Stupid coupon! You live, you learn.