We had a very good experience.
We have been with DonMar for years. We trust their work and their service. We recently purchased a new heat pump from them. Installation was professional and so was the service. We have been using them for maintenance on our unit for years and will continue to use them for maintenance. They are honest and straightforward with their recommendations and always give us various options. They call to remind us when service is due which is a huge plus for busy working people.