The AquaCera HIS under counter water filter is a right choice for someone who does not want to place a water filter on the counter or has a small sink area without enough room to place the filter. Since the under counter water filter is installed directly into the cold water line, it eliminates the risk of running hot water through the ceramic filter which will ruin the filter. The only burden to having the filter installed into the water line is that it should be installed by a licensed plumber. Choosing a stainless steel water filter housing is a bit more pricy than plastic housing, but AquaCera's HIS stainless steel housing is of top quality and offers unmatched durability for years and years of use. A stainless steel water filter housing is the preferred choice for someone who is sensitive to plastics or has multiple chemical sensitivities. When it comes to filtration, the CeraMetix filter is the "best of the best" when compared to other single stage ceramic and carbon block technology water filters. It will perform just as well as the popular CeraUltra or Doulton UltraCarb filter but has the added benefit of fluoride removal. The CeraMetix filter is capable for providing the same level of fluoride removal as a double filter system that uses a ceramic & carbon block filter and a B2 fluoride filter. The AquaCera HIS with CeraMetix filter is our top choice for a single stage under counter water filtration system that will deliver clean, healthy and great tasting drinking water inside your home when you want it.