They’re in Adrian, my house is in Dexter, but I work in Saline. So that I didn’t have to wait all day the service technician called me when he was on his way and we worked out meeting at the house. BIG plus to me. We just bought the house a couple months ago but he was familiar with the history of the device from working with it before. He explained how he trouble-shooted the problem(and what I should look for in the future), what the fix was and walked me through the programing of the unit. About a week after the work was done Mrs. Sieler called to ask if I was happy with the service, had questions, etc. Great service from good people.