"The installer (Hennessee) reviewed with me the work he would be performing. He cleaned and sealed the gutters before installing the filters. He cleaned the area before he left. He was very professional and knowledgeable with the product. He also informed us regarding the condition of our gutters, which were installed over 40 years ago. Based on his service, I highly recommend this company. As far as how good the gutter filters work, it's too soon to tell!"