Actual whitener works well, however the lack of instructions ...
Actual whitener works well,  however the lack of instructions for the mineral syringes makes for questionable application. . Also do not build the mouth piece for more than ten seconds or you will end up with a mouthpiece that will only fit the sloth. Overall the product works well it is hard on the gums but that is to be expected with such a high peroxide concentration.
Rating: 4 stars