Worst ever furnace and duct cleaning ever. I am still getting seeing large dust balls when I replace the furnace filters months after they had "cleaned" my air ducts.
They just seemed to blow air around the air duct openings and go through the motions. The evidence of a very poor job is the crap that is on my furnace filters every time I have changed them since the "service".
Don't waste your money on this company no matter how great a "deal" you get.