They are fantastic..my heating unit was throwing smoke thru the vent. Called AHS my home warranty co and they said would have Consolidated call me to set up appt..they called same day and set appt for following day. Tech came, very proffesional, inspected furnace in attic and checked CO level..said heat exchanger needed replacement and showed CO level was high..shut off unit and said would order new heat exchanger..took couple of days to get part from east coast..they called set appt for next day and came and replaced the part..again two professional techs did the install..AND they cleaned the area so well you would not have known they were there..also special thanks to Marvin who kept me in the loop throughout..