I just bought this product from Bed Bath & Beyond as I wanted a natural product that would brighten my teeth and remove stains. I tried it that night and in the morning and noticed results right away. Excellent product.
It can be messy, but it's worth it! Follow the instructions and when you brush keep your mouth closed as much as possible and when you spit, be gentle so it doesn't splash around the sick bowel - less mess. I am very happy to see the results.
Bottom Line: Yes, I would recommend this to a friend