We are repeat customers of Hi-Tech Air Conditioning, Inc. That in itself says something about the quality of their service. Their workers are always on time, and show up when they say they will. They are careful to clean up behind themselves. They are courteous and polite. They are professional, and they do a great job. The last job they did for us was the routine seasonal maintenance on our heating unit. I have to say, that Hi-Tech Air Conditioning, Inc. continues to meet all our expectations, and that is why we continue to use them. Five stars!