text: STAY AWAY They came out last night charged us for a thermostat that still does not work and then wanted several hundred dollars for pounds of freon and told us it could cost to fix the leak AFter telling them to leave we called another service company who found the valves were loose and put in pounds of freon and we have heat Sierra will size you up and try to get as much as you can when you are vulnerable with no heat or cooling STAY AWAY