I nurtze the brush for the first time and have previously only originals ORAL B used attachments. I use the brush with the electric toothbrush Oral-B Professional Care 700 Black. First I used the rounds essays Original Oral. The difference is already noticeable. Because the bristles are much softer than the originals. I have a empflindliches gums and may therefore not fixed press while brushing. When the brush here, I had fixed press around the teeth to get clean, it takes a little longer until the teeth are clean. A brush holding under normal brushing habits morning and Abens 3 - 4 weeks. After 4 weeks, the brush looks like in the photo. Links is a new right, the cars. If you but firmer pressing the brush is used to keep definitely shorter. Conclusion: I repent buying not because I have my papers for a small price 8 months. For all other the Hard brushes are beforzugen be disappointed, the brush should be soft. Although the price is so low, the brush could be a bit harder. I do not think the harder brush would drive up the price unhemlich into the air. That's why 3 stars.