When I last used Cool Zone Air Conditioning and Heating LLC, they had come in to get our air conditioning unit ready for the summer months. It was around the beginning of spring when they did that. Their technician was on time, professional, and he was courteous. This was not my first time using them, and I had called them up for these services because I feel they are honest, personable, and good at what they do. I would use them in the future as well.