Oh Janina! You Promise so much... but what can you really deliver?...
Now, I do have some pretty white teeth, but there's a few ones that show a bit yellowish patchy places and I wanted to fight them off with Janina, been using it for a week, and not sure what the promise was on this product timewise, but so far (twice a day as suggested on the tube) I have not noticed any changes. Still waiting for those...
Taste: Well once the paste foams up, it's actually quite a nice strong minty flavour that won't leave the mouth so quickly (if you, as suggested on the tube aswell, don't rinse your mouth with water to keep the formula to work longer (makes sense, no?)) but before that it's definitly a baking-powdery attack on your taste buds!
I think if you have to have an overall good tooth paste, there might be a lot of cheaper ones out there, and when it comes to the whitening... well, give it a go. It's not a confirmed success from my side!