I had them perform a tune up on my system to make sure everything was in working order and when I called, the office staff were so friendly and helpful. When the technician arrived he was very polite and insightful. I found out I actually had mold growing in my duct and was even shown a picture so I could see. He then gave me different options on how to fix it. (I didn't feel pressured or like what he was saying was rehearsed) He seemed genuinely concerned for my well being. I would definitely recommend Malek to any of my friends.