It was like unveiling a new toilet. It was one toilet when I started and another after using this cleaner. All of the little black spots and specks that I had seen before were gone. There were barely even any water stains left behind in the top portion of the inner bowl . The cleaner was very hefty and left my toilet sparkling for days after. What I like about this cleaner is that you do not have to use it everyday to maintain a clean bowl . I use it about once a week and use other cleaners in between. Anyone battling serious toilet stains should definitely give this product a try. I guarantee you will not be disappointed.