5 stars for the product! Keep the brush what they promise. Anyway, I'm very happy, even though I was initially skeptical and thought to get with a normal toothbrush an equally good result. But there are worlds between. The brush head Oral-B Precision Clean is highly recommended - but I would recommend the package with 3 x 4 = 12 pieces brush, if you intend the Oral-B to remain faithful. Theoretically makes around half of this 2-pack. I immediately ordered yet.