I had a terrible water (and other funk) stained toilet that I could NOT get cleaned with any cleaner I tried. Within 2 minutes of scrubbing with the Ring X my toilet looked brand new! As a mother of 2 and another on the way, making sure everything is clean is CRITICAL for me. I would recommend it 100%, I have pictures as proof that I sent to several friends. They couldn't believe it.
Bottom Line: Yes, I would recommend this to a friend