They back their work! They offer the best warranty pkg. I've ever been subject to, in my life and I am in my 60's! They are VERY diligent and punctual. It felt sometimes, like the service men were out here so much, that I wasn't sure if it Was a mistake? No! That's how they roll! Every 10-12 weeks, they call to set up the service call and they never, ever, neglect to do that! The service men themselves, will give themselves a 5hr window when confirming the appt., but unlike other companies, (I/e, Direct tv), who do the same but do not show up until the last minute, OR do not show at all then ask to be reseculed!), Air Comfort Solutions, will not put you through all that. As matter of fact, you can always track the servicemen and women, as they make their way to your place, in real time! U even get to pick out what avitar vehicle, you want to watch as you do follow! I can't say enough about this company, I have had to deal with different contractors for different reasons, most utility, and have been disappointed for one reason or another, and then being reminded to do 'my' homework 1st BEFORE hiring! I also have several family members, friends and neighbor's, who use Air Comfort Solutions and are as happy as I am with them, and most have been with them a good long while!