I am happy with M&K Heating and Cooling Services! My old air conditioner broke down on a Saturday afternoon. It was under warranty, and I was informed that it would take 4-6 weeks in order to get the parts delivered. So, on Tuesday, I had them install a brand new air conditioner, and they gave me the option to purchase a 10 year warranty and service plan on the unit, which I did, so now I'm covered completely. Very pleased.