Very unhappy with service...had specific instructions for the technicians to go through my back door because of my front door was broke. The service technician didn't follow instructions. Then during the check he is drilling more holes in my a gray covering to my only two year old unit, and didn't not tell me or ask me if this was ok to do before he drilled.and didn't vacuum up metal fragments from drilling into metal....the last thing that upsets me is I pay $13.95 a month for your yearly service which includes two visits, but doesn't over my $45 cost of changing my filters twice a year...