I wanted to say thank you to everyone at Door-Mart, the customer service representative on the phone was very knowledgeable and answered all my questions. I asked if they could call me 20 or 30 minutes ahead of time so I could run home and meet them, they did. The garage door tech was on time as promised and installed 2 Marantec HP belt drive motors. I love these 2 units, they are so quiet I cant even tell they are running. I liked them so much I am getting 2 more for another house I have. The technician cleaned the garage after he was done working. Door-Mart is a breath of fresh air all around.