These folks respond quickly, are highly customer-focused, do their work well, and are priced fairly. There were two things that really impressed me about them: 1) our furnace was not working and it was cold. They were not the first company to come out but they were the ones who offered to get our heat going--safely--on a temporary basis until we could get permanent repairs--to "take the pressure off" making a decision to repair or replace and which contractor, and product, to select. My wife and I will never forget that no strings attached offer of help. This allowed us time to shop and make a reasoned decision, look at product ratings on Consumer Reports, and get estimates from others. They then made us a solid, reasonable proposal which we weighed against two others, and chose Controlling Systems. 2) the work was done quickly, efficiently, with great follow up on our satisfaction. Our questions were answered in layman terms. So yes, we will use Controlling Systems again. Thank you.