I have used SUNDANCE Energy Services Inc. a lot in the past. They have serviced my water heater and furnace over the years. I have always been happy with the personnel that they send out and the speed in which they respond to my problems. They were out this time to repair my furnace that had stopped igniting. They fixed it promptly without me hovering over them and I have had success with it since! I have not had an occasion of being able to refer them to someone else but if the occasion came up I certainly would do so!