Review (5/5): Great product, but a little messy!
I really like this product. I've been using it for a couple of weeks now, and have noticeably whiter teeth. I use the paste every night. The powder is a little too messy for me. So I just use it every once in a while. As a fyi, if you have a white bathroom be prepared to clean black charcoal off of it on more than one ocasion while using the product.