Only complaint is that they go wonky if you live in an area/home with high humidity. The tablets are pretty easy to chew through in a couple chomps, when you start brushing the foam develops.
I'm super super super cleanly when it comes to teeth, and i won't use most toothpastes. I like that it has no fluoride and that it does clean your teeth. It's different from other charcoal tooth paste.
Paste is runny, thinner, the taste is not minty like it used to be. It doesn't whiten your teeth at all!