The toothbrush is now for a few days with my girlfriend and me in use and we are completely satisfied. It is very handy and easy and has a hochweriges appearance. The result of toothbrushing can we think also nothing to be desired. The surfaces of the teeth are very smooth, the brush head allows cleaning of all parts of the mouth. The battery performance has not yet subsided after several days, so I'm assuming that the battery life described (1 week and longer) applies.
I do not know which describe "unpleasant vibrating" other users of the toothbrush in the other reviews. There is an ultrasonic toothbrush, so you should assume that this brings a certain vibration with and just this is beneficial to the cleaning result. It should be in my opinion not to be diverted by the described "uncomfortable" feeling, because this is not the case so (but impressions are just subjective).
Is full 5 star rating because it is a high quality toothbrush with a stylish design that achieves a great cleaning result and have also compared to other relatively inexpensive: Conclusion!