Immediately I was able to tell the difference this toothbrush makes in overall teeth cleanliness and tartar/plaque reduction. I have used other ionic toothbrushes and this one is equivalent in quality, at a more affordable price. Some have complained about the small size of the head, but I find it ideal, as is the softness of the brush. Only complaint: the product packaging information needs to be translated into English for the American market. If you have not used an ionic toothbrush you're going to have no guidance from this packaging, unless you can read the Japanese language. (Of course, there may be instructions on the product listing here on Amazon or on the product's website; I didn't check either, since I already knew how to use this type of toothbrush.)