I think that the detoxing through the feet, works, so many people say they feel better, including myself. Some of the units available can cost up to $US3000.00, which to me is a very high price, and I feel that this is too expensive. Viatek. makes one that in the US is available from their web site for $US299.00. In Australia I purchased a Viatek Ionic Foot Spa from DealsDirect their web site wanted $AU119.00. plus $AU9.95 for delivery in Australia, It does exactly the same job as a $3000.00 one, so I believe some of the companies are ripping people off, money wise.