Don't see any change on my teeth :(
I haven't seen any change and I've been using it for one week but I would say this.  I like the fact that there is no aftertaste or smell to it but my gums are starting to hurt.  I will give it a few more days and if I don't see any change to the trash it goes.  The only warning is that you must use it at night because it will leave your teeth and gums somewhat gray/blackish color.  I don't see my teeth polished or whiter.
Rating: 2 stars