Very responsive in submitting bid. They were the highest of three bidders, but showed the most interest and were willing to try to address issues others were not. I had only one zone for our 4 br colonial, which had living space on 3 levels. Big temp.disparities between upstairs and downstairs. Original ducts, including trunk supply in walls from first to second floors, were poorly sized and installed. Heating was 26 years old, cooling 25, both working but on their last legs. Cooling Unlimited was able to begin installation within a few days of my accepting their proposal. The 2-person team of installers were at our home for 3 1/2 days. Extremely personable, on-time, and hard-working. Careful to clean up and remove all debris- and with this project there was a lot of debris to remove. The finished ductwork was thoughfully located to leave adequate headroom in our unfinished basement, and is very neat and clean looking in terms of insulation, brackets, etc. The new system works as promised. While the air flow is still not ideal upstairs (I would not agree to break open and rebuild a wall to upsize the main supply), it is a significant improvement from before, and the two zones effectively allow me to compensate for the temperature differences. Overall, the installed systems work as promised. The price seemed on the high side, but given that the installers spent 50+ man hours total inside our home, did a substantial amount of ductwork, and gave me two state of the art systems and a new humidifier, I feel like we got our money's worth. Would definitely recommend Cooling Unlimited for significant install job in a home.