It went well. It took the amount of time they expected it too, which was 2 days. The guys working here were professional, looked good and cleaned their messes as best they could. It would have been very hard to clean everything, after cutting two new holes in the ceiling for air returns there was drywall dust around. They put a large catch sheet in place to catch the big chunks, but obvious could not catch all the dust. I did have to do a good vacuum job after they left. The only glitch was that the 3 zones with the humidifier was a brand new system and the company techs (Trane), couldn't give our tech proper instructions for making the humidifier work with the zones. So it was a few hours of try and try again. Which was complicated by the fact that 1 of the digital thermostats was reading 3-4 degrees off. Once that problem was resolved it was pretty easy for the tech to complete the settings. They were really great and stayed until after 8 pm that last day so we would not be left for a 2nd night without heat. I was very happy with their service.