Now the sound brushes my old one had a normal engine: I also found that it initially tickles something and already weird mouth feeling but after a few days it was just a wonderful feeling of freshness. I'm going with this brush in regions where my old never got there because the round brush head of the old then irritated gums or injured, the new one with the large brush head you can just hang up on the teeth and turning and has wonderfully smooth teeth. I have when I go with my tongue after brushing on the teeth feel as if no deposit or other longer exists.
Negative for me is just the high buzzing sound because I'm a little sensitive to such noises but to brush's only about 2 minutes as there is no problem
Conclusion: Super P / L compared to other brands, is this what my old did not know in every way even has adjustable brushing modes. Build quality is also very neat they not hesitate to recommend