Wouldn't buy again.
Doesn't taste like much, slightly salty if anything. Easy to use, a little messy as it's powder. Seems like it would last a long time(claims it would last 6 months using it once a day, I believe it.). I took a picture before use and after 1 and 2 weeks of using it daily and couldn't tell a difference. It also left black in the spaces in my teeth even after flossing my teeth looked like I had food in them because of the black charcoal that was stuck in there.
Rating: 3 stars