Ten years of struggling with sanitizers of all kinds had me ready to call it quits. I'm not easily impressed with new gadgets, but the Aero-spa , to date, is living up to the hype. Simple installation, minimal maintenance, perfect water. I've not enjoyed my tub this much in ten years. Initial investment is a little pricey, but assuming the life span of this product is several years, if not longer, I can't imagine using anything else. No down side whatsoever, and your customer support has been excellent.