Excellent! I needed our entire 2 unit system replaced, all new ductwork, attic insulation, and replacement of 2 attic fans. I spent almost a month having companies come out to provide estimates. Of the 15 companies who came out to provide estimates, only about 6 actually returned one. Of those, Hector's price was thousands less than the best estimate, and included everything whereas the other estimates were just for the units. But that's not the reason I went with Hector. I went with Hector because of all those who came out to provide estimates, Hector was the only non-salesman. He completed the job when he said he would, and exceeded my expectations. You'd be a fool not to call Hector at DallTex if you have HVAC needs.