Our AC went out on Friday night and it was really hot. On Saturday morning I called Windy City Air Conditioning & Heating and within two hours they had someone out at our house. They explained a few different things they could fix as well as some potential problems that could come up in the future but didn't require immediate service. We opted to do everything so we could get it all taken care of. They did the work by about 1PM, so within about 2 hours we had air again. It was fast and amazing to see how punctual and attentive the technician was. He wore booties in the house which is always a plus. He had all the parts on site so he didn't have to go back to the warehouse or anything. He was prepared and very professional. I was very pleased.