Instruct: Classify Amazon reviews into positive or negative sentiment
Query: No Noticeable Difference

I liked the idea of a miraculously clean toilet, but thought it might be too good to be true. And lo and behold -- it was. I've used the product for 4+ months now, and have to clean the "ChemFree" toilet just as often as I did before. Sadly, there is no noticeable difference between the toilet with the ChemFree and the other toilets without. Considering the package advertises "Never clean a toilet again" but then admits in the fine print that toilet cleaning occasionally is needed, I think it needs to work on the accuracy in advertising.