messy and gum line abrasion, but it works
Okay so I shall start off with the cons of this product: messy, takes a lot of effort to get out of your gun line, and it may erode your gums a bit. The pros is that with continued use, this product will do as it claims. The powder is very fine, taste is decent. With daily use, you may see your teeth become a couple shades whiter.  However, I think I still prefer Crest whitening strips, but this is like the all-natural alternative. This product is not very expensive, so you're not losing much by trying it out.
Rating: 4 stars