I currently own 4 Cimex machines one challenger (will be adding another soon)and a Pathfinder Carpet Extractor w/ Heat. The HWE is used primarly for highly soiled carpets that require extraction prior to using the Cimex or Challenger or both. I also use my HWE as sales tool ...No Mrs Smith I do not use HWE although I do own a state of the art HWE machine wich I use in water/flood situations But as for carpet cleaning I Feel the the low moisture methods are a better choice and here's why......