My toilets usually stay clean. This seems as though it does assist with cleanliness. Just started using we will see in the long term
My Krazy Klean seems to be working well. I've had it just over a month, and was out of town for the last 3 of those weeks, and came home to find just a slight ring at the water line. Considering how hard the water is in my area, I considered this a very good sign that my Krazy Klean was/is working well. I'll definitely recommend it to others!
This works as advertised, I have one in each toilet and in all of my rental homes. Tenants love having clean toilets and my cleaning crew suggest them to everyone.