Windy City Air Conditioning & Heating did a great job. The front office was responsive and easy to schedule with. The technician arrived promptly and got straight to work. He was very professional, very nice, and very diligent. He worked efficiently and got the job done quickly. I liked that he was informative and answered all my questions. I am also glad that he was knowledgeable and knew what he was doing. I am satisfied with the work that he did and everything has been working properly. I had no problems with Windy City Air Conditioning & Heating and will definitely use them again in the future.