My wife and I notice our Central Air conditioner was not working correctly; it would come on and then shut back off or even put out hot air during 80 degree afternoons. I called multiple friends looking for recommendations, but had to resort to both the phone book and internet looking for a repair company. Of the seven or so companies I called, no one was able to come the same day (it was a Saturday), which could be expected during the summer. The deciding factor was how Hiller answered their phone in a friendly, professional way. After a few short question, I made an appointment for the next day, Sunday, and was given a four hour window of 10 -2 p.m. At around 10:15 a.m. I received a call stating the technician was on his way. Great. Two and a half hours later, the technicians actually showed up. Once he showed up, Mike was very friendly and asked a few questions and went right to work checking all the components of my system. Within about twenty minutes, Mike had the problem diagnosed (a slug had crawled on my outside control board) and had even found an additional problem I was not aware of (outside service disconnect was not attached to my house). He showed me the problems, offered several solutions, and quoted me a price. Although he did not have the part on the truck, the warehouse did have it in stock! I even hit him up for a and quot;while you are hereand quot; project to install a new thermostat I had previously purchased. I approve his quote and made another appointment for the next day with a two hour window of 8 - 10 a.m. He asked for no money and left. The next morning, Mike didn't show up until almost 11 a.m. but apologized letting me know they had a surprise meeting he was not anticipating. He went right to work, repairing the AC unit within twenty minutes. When finished, he attempted to install the thermostat I purchased, but seemed to have trouble making it work correctly. He suggested I may have a defective unit. Since I had bought the unit online over a year ago and not through Hiller, I was skeptical about this story until he said he could probably get it switched out through his supplier for no charge. The unit had cost $200 online and I know they wouldn't take it back now. He made my unit work, temporarily, and we made another appointment, with another two hour window. Again, he asked for no money before he left. This time, Mike made his scheduled time and had a replacement thermostat installed in about five minutes. He took the next twenty minutes answering a multitude of my questions about the new thermostat and testing it completely. We sat down and he wrote up his paperwork, during which time he broke out the infamous calculator. After all his calculations, the total came up to be exactly what he quoted, with no hidden charges. Impressive. He even sold me on a $99 Hiller service program, which would save me 10% on all my work today and only cost me $50 additionally, after the savings. I don't usually buy those type of programs, but after his honest, professional work, and his true belief in this program, it was a and quot;no brainerand quot; for me. Overall, I strongly recommend Hiller Plumbing, Heating and Cooling for professional, honest service work. The cost seemed a little high, but you won't have any surprises when it comes time to pay the bill and you will know the work was done buy true professionals!! **I should mention that I am the type of homeowner that may make a normal technician uncomfortable. Since I am a little paranoid about not getting honest work done (remnants of a horrible home builder) I looked over Mike's shoulder the entire time and asked about a million questions, including the infamous and quot;what would it cost to do this or that?and quot; Mike was able to continue working while talking, never broke his professional decorum, and gave me honest feedback. He was completely open with everything he did, and showed me what he was doing, almost training me, as he went along. Great Job Mike!