i was a little skeptical as to wether this product would live up to the claims and had concerns about the cost of the product. i am happy to say that i am pleasantly surprised. this product has reduced the amount of time i spend maintaining the spa. the odor i was experiencing is gone and my wife tells me she loves the way her skin feels after being in the spa, as opposed to before this product. i used to have the spa drained and cleaned once a quarter, i can now go four and half months which saves enough money to pay the increased cost over my old frog based system. very happy with this product