I ordered this the other week, the first time I used it I saw instant results I was quite stunned, I was a bit dubious at first and scared it may take off the enamel on my teeth so I put a thin layer of toothpaste on my brush first then dipped it in to the charcoal, brushed for a few minutes then rinse and clean my teeth with just toothpaste after, my teeth felt like I had been to the dentist and where a few colours whiter and had a glisten to them! I now use this procedure every other day I am glad I have this in my life now! I saw it recommended by a dentist on This Morning and there is no going back, it does not taste of anything or feel chalky, I think its great and will be buying this product constantly.