I ordered my first whole home water filter from them in 1997. At the time it was one of the few whole house filters that seemed legitimate, and I think only one of two companies that actually made their systems in the States. When I moved house in 2007, I opted to leave our filter behind and purchase a new one, along with one of their under-sink water filters. Every purchase I've made has been wonderful. The best water filters I've come across, from the quality of the materials to the taste of the water, it's been nothing but 5 stars all the way. Their customer service is also wonderful. I never get a machine, it's always someone who is genuinely helpful and pleasant.