SUNDANCE Energy Services Inc. recently came out to our home when our heater broke down. We were without heat! The technician came over to diagnose the situation and said he had to order a part for the unit. Meanwhile, he temporarily got the heater working. The heater has yet to go out again and has remained working all of this time. In that case, the technician never had to return and we did not need the part after all. I assume the cost was fair for the service call, although it was my husband who really handled that. He seemed fine with it. We definitely would use them again in a heartbeat!