Have had Krazy Klean for 25 days but installed maybe 14 days ago. So far my toilets look clean and I am happy with my purchase.
I've only used two of the three I purchased. For the third one I am waiting out the product I added to the tank before the Krazy Kleans arrived. However, the first one was installed in our worst toilet, our master bathroom's. It was constantly dirty and needing cleaning, in the bowl and on the sides (where the water comes out). However, now, as advertise, that toilet is sparkling clean all the time. For the second one, a similar result in our kids' bathroom. I can't wait to install the third one in our guest bathroom. No more embarrassing dirty toilets. I am blown away, as so far it looks like my toilet cleaning days are behind me!
So far I am very pleased with your product. No ring in either one of my toilets!! We have well water and I always had to scrub the brown ring with a pumice stone. I am pleasantly surprised! Thank you