I originally heard ads on the radio for 2 other a/c companies that were giving huge discounts. I called those 2 and found 2 others on Angie's List. Aire Serv was the 3rd quote that I got. Allen was the rep that came out. He was very thorough and informative. The measurements that he took were the same as the others and he came out with the same 3.5 ton as the others did, but he gave me a detailed explanation and other sources to look up. We had a disconnected air return. The other a/c companies just said they would hook up a return that was disconnected and just basically said yes to whatever I wanted. Allen suggested a better way to get more air return. Aire Serv's quote was about $2000 less than the next lowest quote. The next lowest company did come down to within $900, then said they could match quote, but would charge I think it was 1-3% if I used a credit card. Aire Serv didn't charge extra for pmt w/AmEx. (Also, that 2nd company was late for appointment.) On the day of install, the techs called to say they were on their way, would be here within 30 minutes. They arrived around 9am and finished at about 5:30pm. The tear out and install went smoothly...until the humidifier was installed. They had a separate tech that had to get the humidifier working. We got the new steam humidifier by Honeywell. The tech was not able to make it by the time the installers left, but called and said he was just leaving the last job and could be here in about 2 hours. I wasn't going to be home so said to come back the next day. (I didn't pay for the install yet since it wasn't completed.) The tech came the next day & worked on the humidifier for about 6 hours, still couldn't get it to work. I made appointment for him to come back following week. In the mean time, a/c & heat worked, just humidifier not working. I got a call from rep asking for 1/2 cost of install and said that I was ok with that. Then owner, Kelvin, called and took credit card info. The following week, John came out again, figured out it was a bad part and replaced entire humidifier unit. Installed the new one quickly and got it working. I called their office and paid balance. Next day, humidifier stopped working "press reset" button lit. Called again for service. They sent Steve their tech mgr and it took him awhile to get it working after being on the phone with Honeywell. (Just checked humidifier again, "press reset" light on again, but can't run heat right now since too warm. Going to have to call again maybe even get rid of humidifier) Overall, Aire Serv did everything they could to get my HVAC working correctly. The a/c works great, all rooms are cooled evenly now. New system is quiet. Just hope the humidifier works when we have to turn the heat on. Aire Serv did a great job, very courteous, cleaned up after job, good value for $.