Waterdoc markets most water products that are of value and do no harm. The ionizers using our filthy fluoridated water have a great deal of potential to do harm, using only a carbon filter. As Waterdoc, note that most people writing "great" things about the ionizers do in fact sell them with little to no knowledge of water or health. Even many health providers have not thought through the ionizer route before endorsing it. Go to ewater.com and print out the letter on acid/alkaline ionizers in the right hand column if you want a more complete description of what is happening with water ionizers. Don't slander my work with your own prejudice or limited knowledge, please. Note that I did not in my previous response send her to any particular source. Many are selling the Vitalizer plus units. I personally only care that she get accurate information about the ionizers before making an informed decision for herself.