Quick summary. Extra Air Conditioning did a basic pressure and vacuum test on my system and nothing more. There is no warranty. I give them a grade of “D”. I would think twice about using them again. I blame myself for not requesting detailed itemization in writing first. Try somewhere else first. Extra Air’s actions are best described as “Take the money and run. Give mediocre service now, expect problem to develop down the road due to poor original service provided, and return later for another service call and more charges. No warranty”. I regret to say this interpretation best fits the facts. Your AC needs may not be mine. If you need inspection, repair or install this review may not be directly relevant to your needs, but will still give you insight into company. I needed only a complete pressure and vacuum test on the DIY system I installed. What I got was a mediocre pressure and vacuum test. Sherif, the owner I suppose, came by and quoted me an agreed price. At this time and in subsequent texts I mentioned the need for an extra 2.43 oz of refrigerant, and advice on how to handle a partially stripped thread. Sherif visually inspected the thread when he stopped by briefly the second time to change his first appointment time. He said threads were OK as is. “Are you sure?” I asked. He again said yes. I offered two possible solutions to fix problem in advance before pressure testing, JB Weld and LockTite. He said they were not necessary. I took his professional advice. So if a slow leaks develops down the road, and it is later determined to be this fitting, the leak will be repaired free of charge, right? But there is a more cynical interpretation available: “Let it slowly leak now, come back and fix it a month or year or more later for additional fees. Take the money and run now”. Days later technician Alex arrived at house. He was not unfriendly, but did not inspire confidence. His first question was “What do you want me to do?”— the office should have made this clear in advance but I said nothing. Alex pressure tested one line at 200 lbs and the other two lines at only 150, each for about 10 min. A simple turn of the knob would have cranked the pressure up to 200. I asked him why he didn’t test all lines at same pressure but never got an answer, he just mumbled something. I further asked why he didn’t test lines at even higher pressure, like the low side pressure of 320 as stated on plate, or higher. Again my questions were ignored. ( I don’t think he was properly trained or knowledgeable on differences between R-22 and r410a pressures.) In short Alex performed minimal pressure testing for minimal times. He did not use the bubble or other leak detection test. The bubble test is a simple test which involves applying soapy liquid to flare fittings to look for bubbles which indicate a leak. All fitting were easily accessible but none were tested. He did not remove Shraeder valve before testing. He did not use a micron gauge to test below 500 microns or lower, which is a much more sensitive vacuum test. The following further did not inspire confidence in Alex: When his Allen wrench got stuck in socket and couldn’t be removed, he began tapping on it with another tool to loosen. I mentioned simply reverse the direction of the ratchet. Apparently he never learned this trick in his 8 years experience. He kept saying “there’s no refrigerant…, no refrigerant…” as he opened valves. He apparently didn’t know he had to open the master valve too. He tried to screw the r410a adapter on the master Shraeder valve and complained of bad design. But there is no need to attach adapter here. He said he didn’t have the equipment with him to add 2.43 oz of refrigerant. He didn’t seem knowledgeable of my system, even though he said he installed another mini split earlier the same day. I already mentioned his erratic behavior, when he tested different lines at different pressures, and that he did not test higher. All these actions made me question Alex’s mental condition at the time. I never received the 2.43 oz of 410a requested, in text and in person with Sherif. I mentioned this several times to him. I thought this was included in the agreed price since both were discussed at same first meeting. I am about 2% low now which means system is not optimal. The next day I texted Sheriff via office manager Serena, to request a price reduction for the mediocre service provided. In phone calls, Serena said it was not necessary to test at high pressure. False. What do the words “high pressure leak” mean? At least test at low side pressure of 320 listed on plate. She also said system never operates over 150, since I have three zones/heads, the 500 lb will be distributed among them. False. In addition, heat pumps work at much higher pressures I reminded. I still don’t know if my system can pass a stress test. But this haggling was really irrelevant; the answer to price reduction was “No”, with no warranty. The point Serena kept making is that “this is customary practice, usual practice…”. I asked, “Is that state standards, city, or industry standards? Though I asked this several times as we talked in circles, she was careful to never answer. I hope not. Buyer beware. Having said this, I don’t know if other contractors are any better. I don’t know where all the rave reviews for Extra Air came from. Try someone else first.