I was just about to order about $150 worth of chemicals for our hot tub and decided instead to research something that was chemical free. We have had our ozone treatment in place for a month and it is fabulous!!! We just returned from a 9 day trip and the water was clean as could be. It is so nice not to have to shower off after use and slather on the lotion. We find ourselves using the hot tub more often, and enjoying it more because of the lack of chemicals, not coughing on the mist, etc. Installation was a piece of cake. We did order a "cable protector" online for the tube to go through from the machine to the tub. We don't have to worry about someone tripping on it or stepping on it causing damage. There is nothing we don't like about this new system. It's definitely money well spent!!