In the beginning I had to get used to the brush head, which I was allowed to test. The bristles are a bit softer than those of a regular electric toothbrush, so I thought it might clean a little less. But I have the feeling that I can achieve everything much better through the hair.
Last week I had to use the old toothbrush again, because I had to charge the new one. How hard the hair felt!
Other than that, it's a nice, good brush head.
One downside: it has to be replaced every three months. That's a bit expensive every time.