Thus far…I have been really impressed with this product!
After 1 month of use, we have found that our “in the country “ well water toilets are no longer dingy brown! Even the tank is clear of brown water! No ring around the water line either, when we are gone for a week at a time. I hope it continues to work for the next few years. But people…. You are still going to have to clean your toilet bowl!
I have 3 boys, who never flush. It is their shared bathroom that tells me this product truly works!! No Rings!