I am a York Dealer now. I was with Carrier for 12 years and Trane for 4 years. I have installed most every major brand except Amana and Heil. I install my systems by the book, everytime. I cannot say anybody's equipment is better than any other if it is installed properly and maintained. Customers ask me quite often why are you selling brand "x" over brand "y". I tell them it is not the quality of the equipment, they are all very similar, it is about the service I receive from the manufacturer and their willingness to "make it right" if there is a problem. But I do tell the customers that demand brand "y" O.K. that is what you will get.