Really gOOd product, if you can handle the "black" :-)
I was skeptical, especially since I have the kind of teeth that don't get very white no matter what I do or use, but this stuff has done the best with my teeth considering everything. I was very surprised after the first use, and then the second use, this stuff is very gOOd and works very well, and I think those with teeth that can get really white but are just yellowed will be VERY happy with this stuff, but be careful, super-fine powder and it can make a mess if it gets away from you, but over-all.....worth it! :-)
Rating: 5 stars