I started using pearl drops tooth polish about a year ago i used to smoke and it had left staining on areas of my teeth leaving them discoloured making me feel self concious at times. A friend used this tooth polish and felt that it was very good so i began to use it. The fresh taste is fantastic and left my teeth feeling clean and smooth. It took over a period of a few weeks when i visibly became aware of how much of a difference it was making to the colour of my teeth leaving me with a brighter smile. I love that i only have to use a small amount on my tooth brush to maximise the results. My only concerns that i do have are that i have notices that my teeth are visibly thinner however, i do not know if this is a result of using this high quality product.