Last year I had Central Air installed in my home and chose the Carrier Central Air system. Here in Michigan it gets very hot in the summer, I feel that we have had record heat days this past summer and I think the Cooling unit has been great. I don't know how I honestly lived without it before. I find the thermostat is easy to use and the unit cools the whole my house really fast, usually within thirty minutes or so. I feel that the unit isn't very noisy, but I can hear that it is running outside, Inside I can only hear a slight blowing noise coming out of the vents. My electric bill hasn't gone up too much only around $30.00 a month. Its well worth the cost to stay cool. Overall I love the system and would recommend it to others to purchase a Carrier Central Air Conditioning system for their home.